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</nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Indice" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Mostra/Nascondi l'indice" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Mostra/Nascondi l'indice</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">91 (numero)</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Vai a una voce in un'altra lingua. Disponibile in 71 lingue" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-71" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">71 lingue</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ab mw-list-item"><a href="https://ab.wikipedia.org/wiki/91_(%D0%B0%D1%85%D1%8B%D4%A5%D1%85%D1%8C%D0%B0%D3%A1%D0%B0%D1%80%D0%B0)" title="91 (ахыԥхьаӡара) - abcaso" lang="ab" hreflang="ab" data-title="91 (ахыԥхьаӡара)" data-language-autonym="Аԥсшәа" data-language-local-name="abcaso" class="interlanguage-link-target"><span>Аԥсшәа</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/91_(%D8%B9%D8%AF%D8%AF)" title="91 (عدد) - arabo" lang="ar" hreflang="ar" data-title="91 (عدد)" data-language-autonym="العربية" data-language-local-name="arabo" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/91_(%C9%99d%C9%99d)" title="91 (ədəd) - azerbaigiano" lang="az" hreflang="az" data-title="91 (ədəd)" data-language-autonym="Azərbaycanca" data-language-local-name="azerbaigiano" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-azb mw-list-item"><a href="https://azb.wikipedia.org/wiki/%DB%B9%DB%B1_(%D8%B3%D8%A7%DB%8C%DB%8C)" title="۹۱ (سایی) - South Azerbaijani" lang="azb" hreflang="azb" data-title="۹۱ (سایی)" data-language-autonym="تۆرکجه" data-language-local-name="South Azerbaijani" class="interlanguage-link-target"><span>تۆرکجه</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/91_(%D1%87%D0%B8%D1%81%D0%BB%D0%BE)" title="91 (число) - bulgaro" lang="bg" hreflang="bg" data-title="91 (число)" data-language-autonym="Български" data-language-local-name="bulgaro" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bo mw-list-item"><a href="https://bo.wikipedia.org/wiki/%E0%BC%A9%E0%BC%A1_(%E0%BD%82%E0%BE%B2%E0%BD%84%E0%BD%A6%E0%BC%8B%E0%BD%80%E0%BC%8D)" title="༩༡ (གྲངས་ཀ།) - tibetano" lang="bo" hreflang="bo" data-title="༩༡ (གྲངས་ཀ།)" data-language-autonym="བོད་ཡིག" data-language-local-name="tibetano" class="interlanguage-link-target"><span>བོད་ཡིག</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Noranta-u" title="Noranta-u - catalano" lang="ca" hreflang="ca" data-title="Noranta-u" data-language-autonym="Català" data-language-local-name="catalano" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cdo mw-list-item"><a href="https://cdo.wikipedia.org/wiki/91" title="91 - Mindong" lang="cdo" hreflang="cdo" data-title="91" data-language-autonym="閩東語 / Mìng-dĕ̤ng-ngṳ̄" data-language-local-name="Mindong" class="interlanguage-link-target"><span>閩東語 / Mìng-dĕ̤ng-ngṳ̄</span></a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%D9%A9%D9%A1_(%DA%98%D9%85%D8%A7%D8%B1%DB%95)" title="٩١ (ژمارە) - curdo centrale" lang="ckb" hreflang="ckb" data-title="٩١ (ژمارە)" data-language-autonym="کوردی" data-language-local-name="curdo centrale" class="interlanguage-link-target"><span>کوردی</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/91_(%C4%8D%C3%ADslo)" title="91 (číslo) - ceco" lang="cs" hreflang="cs" data-title="91 (číslo)" data-language-autonym="Čeština" data-language-local-name="ceco" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-cv mw-list-item"><a href="https://cv.wikipedia.org/wiki/91_(%D1%85%D0%B8%D1%81%D0%B5%D0%BF)" title="91 (хисеп) - ciuvascio" lang="cv" hreflang="cv" data-title="91 (хисеп)" data-language-autonym="Чӑвашла" data-language-local-name="ciuvascio" class="interlanguage-link-target"><span>Чӑвашла</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/91_(tal)" title="91 (tal) - danese" lang="da" hreflang="da" data-title="91 (tal)" data-language-autonym="Dansk" data-language-local-name="danese" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/91_(%CE%B1%CF%81%CE%B9%CE%B8%CE%BC%CF%8C%CF%82)" title="91 (αριθμός) - greco" lang="el" hreflang="el" data-title="91 (αριθμός)" data-language-autonym="Ελληνικά" data-language-local-name="greco" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-eml mw-list-item"><a href="https://eml.wikipedia.org/wiki/91_(n%C3%B9mer)" title="91 (nùmer) - Emiliano-Romagnolo" lang="egl" hreflang="egl" data-title="91 (nùmer)" data-language-autonym="Emiliàn e rumagnòl" data-language-local-name="Emiliano-Romagnolo" class="interlanguage-link-target"><span>Emiliàn e rumagnòl</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/91_(number)" title="91 (number) - inglese" lang="en" hreflang="en" data-title="91 (number)" data-language-autonym="English" data-language-local-name="inglese" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/91_(nombro)" title="91 (nombro) - esperanto" lang="eo" hreflang="eo" data-title="91 (nombro)" data-language-autonym="Esperanto" data-language-local-name="esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Noventa_y_uno" title="Noventa y uno - spagnolo" lang="es" hreflang="es" data-title="Noventa y uno" data-language-autonym="Español" data-language-local-name="spagnolo" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Laurogeita_hamaika" title="Laurogeita hamaika - basco" lang="eu" hreflang="eu" data-title="Laurogeita hamaika" data-language-autonym="Euskara" data-language-local-name="basco" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%DB%B9%DB%B1_(%D8%B9%D8%AF%D8%AF)" title="۹۱ (عدد) - persiano" lang="fa" hreflang="fa" data-title="۹۱ (عدد)" data-language-autonym="فارسی" data-language-local-name="persiano" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/91_(luku)" title="91 (luku) - finlandese" lang="fi" hreflang="fi" data-title="91 (luku)" data-language-autonym="Suomi" data-language-local-name="finlandese" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fj mw-list-item"><a href="https://fj.wikipedia.org/wiki/Ciwasagavulikadua" title="Ciwasagavulikadua - figiano" lang="fj" hreflang="fj" data-title="Ciwasagavulikadua" data-language-autonym="Na Vosa Vakaviti" data-language-local-name="figiano" class="interlanguage-link-target"><span>Na Vosa Vakaviti</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/91_(nombre)" title="91 (nombre) - francese" lang="fr" hreflang="fr" data-title="91 (nombre)" data-language-autonym="Français" data-language-local-name="francese" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/91_(uimhir)" title="91 (uimhir) - irlandese" lang="ga" hreflang="ga" data-title="91 (uimhir)" data-language-autonym="Gaeilge" data-language-local-name="irlandese" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-gan mw-list-item"><a href="https://gan.wikipedia.org/wiki/91" title="91 - gan" lang="gan" hreflang="gan" data-title="91" data-language-autonym="贛語" data-language-local-name="gan" class="interlanguage-link-target"><span>贛語</span></a></li><li class="interlanguage-link interwiki-ha mw-list-item"><a href="https://ha.wikipedia.org/wiki/91_(al%C6%99alami)" title="91 (alƙalami) - hausa" lang="ha" hreflang="ha" data-title="91 (alƙalami)" data-language-autonym="Hausa" data-language-local-name="hausa" class="interlanguage-link-target"><span>Hausa</span></a></li><li class="interlanguage-link interwiki-ht mw-list-item"><a href="https://ht.wikipedia.org/wiki/91_(nonm)" title="91 (nonm) - creolo haitiano" lang="ht" hreflang="ht" data-title="91 (nonm)" data-language-autonym="Kreyòl ayisyen" data-language-local-name="creolo haitiano" class="interlanguage-link-target"><span>Kreyòl ayisyen</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/91_(sz%C3%A1m)" title="91 (szám) - ungherese" lang="hu" hreflang="hu" data-title="91 (szám)" data-language-autonym="Magyar" data-language-local-name="ungherese" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/91_(%D5%A9%D5%AB%D5%BE)" title="91 (թիվ) - armeno" lang="hy" hreflang="hy" data-title="91 (թիվ)" data-language-autonym="Հայերեն" data-language-local-name="armeno" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-hyw mw-list-item"><a href="https://hyw.wikipedia.org/wiki/91_(%D5%A9%D5%AB%D6%82)" title="91 (թիւ) - Western Armenian" lang="hyw" hreflang="hyw" data-title="91 (թիւ)" data-language-autonym="Արեւմտահայերէն" data-language-local-name="Western Armenian" class="interlanguage-link-target"><span>Արեւմտահայերէն</span></a></li><li class="interlanguage-link interwiki-ia mw-list-item"><a href="https://ia.wikipedia.org/wiki/91_(numero)" title="91 (numero) - interlingua" lang="ia" hreflang="ia" data-title="91 (numero)" data-language-autonym="Interlingua" data-language-local-name="interlingua" class="interlanguage-link-target"><span>Interlingua</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/91_(angka)" title="91 (angka) - indonesiano" lang="id" hreflang="id" data-title="91 (angka)" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonesiano" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/91" title="91 - giapponese" lang="ja" hreflang="ja" data-title="91" data-language-autonym="日本語" data-language-local-name="giapponese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/91_(%E1%83%A0%E1%83%98%E1%83%AA%E1%83%AE%E1%83%95%E1%83%98)" title="91 (რიცხვი) - georgiano" lang="ka" hreflang="ka" data-title="91 (რიცხვი)" data-language-autonym="ქართული" data-language-local-name="georgiano" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/91" title="91 - coreano" lang="ko" hreflang="ko" data-title="91" data-language-autonym="한국어" data-language-local-name="coreano" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-lbe mw-list-item"><a href="https://lbe.wikipedia.org/wiki/%D0%A3%D1%80%D1%86%D3%80%D0%B0%D0%BB%D0%BB%D0%B8%D0%B9_%D1%86%D0%B0%D0%B2%D0%B0" title="УрцӀаллий цава - Lak" lang="lbe" hreflang="lbe" data-title="УрцӀаллий цава" data-language-autonym="Лакку" data-language-local-name="Lak" class="interlanguage-link-target"><span>Лакку</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/91_(skaitlis)" title="91 (skaitlis) - lettone" lang="lv" hreflang="lv" data-title="91 (skaitlis)" data-language-autonym="Latviešu" data-language-local-name="lettone" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-mai mw-list-item"><a href="https://mai.wikipedia.org/wiki/%E0%A5%AF%E0%A5%A7" title="९१ - maithili" lang="mai" hreflang="mai" data-title="९१" data-language-autonym="मैथिली" data-language-local-name="maithili" class="interlanguage-link-target"><span>मैथिली</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/91_(%D0%B1%D1%80%D0%BE%D1%98)" title="91 (број) - macedone" lang="mk" hreflang="mk" data-title="91 (број)" data-language-autonym="Македонски" data-language-local-name="macedone" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-mni mw-list-item"><a href="https://mni.wikipedia.org/wiki/%EA%AF%B9%EA%AF%B1" title="꯹꯱ - manipuri" lang="mni" hreflang="mni" data-title="꯹꯱" data-language-autonym="ꯃꯤꯇꯩ ꯂꯣꯟ" data-language-local-name="manipuri" class="interlanguage-link-target"><span>ꯃꯤꯇꯩ ꯂꯣꯟ</span></a></li><li class="interlanguage-link interwiki-mr mw-list-item"><a href="https://mr.wikipedia.org/wiki/%E0%A5%AF%E0%A5%A7_(%E0%A4%B8%E0%A4%82%E0%A4%96%E0%A5%8D%E0%A4%AF%E0%A4%BE)" title="९१ (संख्या) - marathi" lang="mr" hreflang="mr" data-title="९१ (संख्या)" data-language-autonym="मराठी" data-language-local-name="marathi" class="interlanguage-link-target"><span>मराठी</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/91_(nombor)" title="91 (nombor) - malese" lang="ms" hreflang="ms" data-title="91 (nombor)" data-language-autonym="Bahasa Melayu" data-language-local-name="malese" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-mzn mw-list-item"><a href="https://mzn.wikipedia.org/wiki/%DB%B9%DB%B1_(%D8%B9%D8%AF%D8%AF)" title="۹۱ (عدد) - mazandarani" lang="mzn" hreflang="mzn" data-title="۹۱ (عدد)" data-language-autonym="مازِرونی" data-language-local-name="mazandarani" class="interlanguage-link-target"><span>مازِرونی</span></a></li><li class="interlanguage-link interwiki-nah mw-list-item"><a href="https://nah.wikipedia.org/wiki/N%C4%81uhp%C5%8Dhualmahtl%C4%81ctli_onc%C4%93" title="Nāuhpōhualmahtlāctli oncē - Nahuatl" lang="nah" hreflang="nah" data-title="Nāuhpōhualmahtlāctli oncē" data-language-autonym="Nāhuatl" data-language-local-name="Nahuatl" class="interlanguage-link-target"><span>Nāhuatl</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/91_(getal)" title="91 (getal) - olandese" lang="nl" hreflang="nl" data-title="91 (getal)" data-language-autonym="Nederlands" data-language-local-name="olandese" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/91_(tall)" title="91 (tall) - norvegese bokmål" lang="nb" hreflang="nb" data-title="91 (tall)" data-language-autonym="Norsk bokmål" data-language-local-name="norvegese bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-nso mw-list-item"><a href="https://nso.wikipedia.org/wiki/91_(nomoro)" title="91 (nomoro) - sotho del nord" lang="nso" hreflang="nso" data-title="91 (nomoro)" data-language-autonym="Sesotho sa Leboa" data-language-local-name="sotho del nord" class="interlanguage-link-target"><span>Sesotho sa Leboa</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/91_(liczba)" title="91 (liczba) - polacco" lang="pl" hreflang="pl" data-title="91 (liczba)" data-language-autonym="Polski" data-language-local-name="polacco" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pnb mw-list-item"><a href="https://pnb.wikipedia.org/wiki/91" title="91 - Western Punjabi" lang="pnb" hreflang="pnb" data-title="91" data-language-autonym="پنجابی" data-language-local-name="Western Punjabi" class="interlanguage-link-target"><span>پنجابی</span></a></li><li class="interlanguage-link interwiki-ps mw-list-item"><a href="https://ps.wikipedia.org/wiki/%DB%B9%DB%B1_(%D8%B9%D8%AF%D8%AF)" title="۹۱ (عدد) - pashto" lang="ps" hreflang="ps" data-title="۹۱ (عدد)" data-language-autonym="پښتو" data-language-local-name="pashto" class="interlanguage-link-target"><span>پښتو</span></a></li><li class="interlanguage-link interwiki-pt badge-Q70893996 mw-list-item" title=""><a href="https://pt.wikipedia.org/wiki/Noventa_e_um" title="Noventa e um - portoghese" lang="pt" hreflang="pt" data-title="Noventa e um" data-language-autonym="Português" data-language-local-name="portoghese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/91_(num%C4%83r)" title="91 (număr) - rumeno" lang="ro" hreflang="ro" data-title="91 (număr)" data-language-autonym="Română" data-language-local-name="rumeno" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/91_(%D1%87%D0%B8%D1%81%D0%BB%D0%BE)" title="91 (число) - russo" lang="ru" hreflang="ru" data-title="91 (число)" data-language-autonym="Русский" data-language-local-name="russo" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/91_(number)" title="91 (number) - Simple English" lang="en-simple" hreflang="en-simple" data-title="91 (number)" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/91_(%C5%A1tevilo)" title="91 (število) - sloveno" lang="sl" hreflang="sl" data-title="91 (število)" data-language-autonym="Slovenščina" data-language-local-name="sloveno" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-so mw-list-item"><a href="https://so.wikipedia.org/wiki/91_(tiro)" title="91 (tiro) - somalo" lang="so" hreflang="so" data-title="91 (tiro)" data-language-autonym="Soomaaliga" data-language-local-name="somalo" class="interlanguage-link-target"><span>Soomaaliga</span></a></li><li class="interlanguage-link interwiki-srn mw-list-item"><a href="https://srn.wikipedia.org/wiki/Numro_91" title="Numro 91 - sranan tongo" lang="srn" hreflang="srn" data-title="Numro 91" data-language-autonym="Sranantongo" data-language-local-name="sranan tongo" class="interlanguage-link-target"><span>Sranantongo</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/91_(tal)" title="91 (tal) - svedese" lang="sv" hreflang="sv" data-title="91 (tal)" data-language-autonym="Svenska" data-language-local-name="svedese" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-sw mw-list-item"><a href="https://sw.wikipedia.org/wiki/Tisini_na_moja" title="Tisini na moja - swahili" lang="sw" hreflang="sw" data-title="Tisini na moja" data-language-autonym="Kiswahili" data-language-local-name="swahili" class="interlanguage-link-target"><span>Kiswahili</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/91" title="91 - thailandese" lang="th" hreflang="th" data-title="91" data-language-autonym="ไทย" data-language-local-name="thailandese" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/91_(say%C4%B1)" title="91 (sayı) - turco" lang="tr" hreflang="tr" data-title="91 (sayı)" data-language-autonym="Türkçe" data-language-local-name="turco" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-tt mw-list-item"><a href="https://tt.wikipedia.org/wiki/91_(%D1%81%D0%B0%D0%BD)" title="91 (сан) - tataro" lang="tt" hreflang="tt" data-title="91 (сан)" data-language-autonym="Татарча / tatarça" data-language-local-name="tataro" class="interlanguage-link-target"><span>Татарча / tatarça</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/91_(%D1%87%D0%B8%D1%81%D0%BB%D0%BE)" title="91 (число) - ucraino" lang="uk" hreflang="uk" data-title="91 (число)" data-language-autonym="Українська" data-language-local-name="ucraino" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-ur mw-list-item"><a href="https://ur.wikipedia.org/wiki/91_(%D8%B9%D8%AF%D8%AF)" title="91 (عدد) - urdu" lang="ur" hreflang="ur" data-title="91 (عدد)" data-language-autonym="اردو" data-language-local-name="urdu" class="interlanguage-link-target"><span>اردو</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/91_(son)" title="91 (son) - uzbeco" lang="uz" hreflang="uz" data-title="91 (son)" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="uzbeco" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/91_(s%E1%BB%91)" title="91 (số) - vietnamita" lang="vi" hreflang="vi" data-title="91 (số)" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamita" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-war mw-list-item"><a href="https://war.wikipedia.org/wiki/91_(ihap)" title="91 (ihap) - waray" lang="war" hreflang="war" data-title="91 (ihap)" data-language-autonym="Winaray" data-language-local-name="waray" class="interlanguage-link-target"><span>Winaray</span></a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/91" title="91 - wu" lang="wuu" hreflang="wuu" data-title="91" data-language-autonym="吴语" data-language-local-name="wu" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-za mw-list-item"><a href="https://za.wikipedia.org/wiki/91" title="91 - zhuang" lang="za" hreflang="za" data-title="91" data-language-autonym="Vahcuengh" data-language-local-name="zhuang" class="interlanguage-link-target"><span>Vahcuengh</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/91" title="91 - cinese" lang="zh" hreflang="zh" data-title="91" data-language-autonym="中文" data-language-local-name="cinese" class="interlanguage-link-target"><span>中文</span></a></li><li class="interlanguage-link interwiki-zh-min-nan mw-list-item"><a href="https://zh-min-nan.wikipedia.org/wiki/91" title="91 - min nan" lang="nan" hreflang="nan" data-title="91" data-language-autonym="閩南語 / Bân-lâm-gú" data-language-local-name="min nan" class="interlanguage-link-target"><span>閩南語 / Bân-lâm-gú</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/91" title="91 - cantonese" lang="yue" hreflang="yue" data-title="91" data-language-autonym="粵語" data-language-local-name="cantonese" class="interlanguage-link-target"><span>粵語</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q690992#sitelinks-wikipedia" title="Modifica collegamenti interlinguistici" class="wbc-editpage">Modifica collegamenti</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Namespace"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/91_(numero)" title="Vedi la voce [c]" accesskey="c"><span>Voce</span></a></li><li id="ca-talk" class="new vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Discussione:91_(numero)&action=edit&redlink=1" rel="discussion" class="new" title="Vedi le discussioni relative a questa pagina (la pagina non esiste) [t]" accesskey="t"><span>Discussione</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="Cambia versione linguistica" > <label id="vector-variants-dropdown-label" for="vector-variants-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">italiano</span> </label> <div class="vector-dropdown-content"> <div id="p-variants" class="vector-menu mw-portlet mw-portlet-variants emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> </div> </div> </nav> </div> <div id="right-navigation" class="vector-collapsible"> <nav aria-label="Visite"> <div id="p-views" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-views" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-view" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/91_(numero)"><span>Leggi</span></a></li><li id="ca-ve-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=91_(numero)&veaction=edit" title="Modifica questa pagina [v]" accesskey="v"><span>Modifica</span></a></li><li id="ca-edit" class="collapsible vector-tab-noicon mw-list-item"><a href="/w/index.php?title=91_(numero)&action=edit" title="Modifica il 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<div class="vector-dropdown-content"> <div id="vector-page-tools-unpinned-container" class="vector-unpinned-container"> <div id="vector-page-tools" class="vector-page-tools vector-pinnable-element"> <div class="vector-pinnable-header vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">Strumenti</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">sposta nella barra laterale</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">nascondi</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="Altre opzioni" > <div class="vector-menu-heading"> Azioni </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected vector-more-collapsible-item mw-list-item"><a href="/wiki/91_(numero)"><span>Leggi</span></a></li><li id="ca-more-ve-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=91_(numero)&veaction=edit" title="Modifica questa pagina [v]" accesskey="v"><span>Modifica</span></a></li><li id="ca-more-edit" class="collapsible vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=91_(numero)&action=edit" title="Modifica il wikitesto di questa pagina [e]" accesskey="e"><span>Modifica wikitesto</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=91_(numero)&action=history"><span>Cronologia</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> Generale </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Speciale:PuntanoQui/91_(numero)" title="Elenco di tutte le pagine che sono collegate a questa [j]" accesskey="j"><span>Puntano qui</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Speciale:ModificheCorrelate/91_(numero)" rel="nofollow" title="Elenco delle ultime modifiche alle pagine collegate a questa [k]" accesskey="k"><span>Modifiche correlate</span></a></li><li id="t-specialpages" class="mw-list-item"><a href="/wiki/Speciale:PagineSpeciali" title="Elenco di tutte le pagine speciali [q]" accesskey="q"><span>Pagine speciali</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=91_(numero)&oldid=140545487" title="Collegamento permanente a questa versione di questa pagina"><span>Link permanente</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=91_(numero)&action=info" title="Ulteriori informazioni su questa pagina"><span>Informazioni pagina</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=Speciale:Cita&page=91_%28numero%29&id=140545487&wpFormIdentifier=titleform" title="Informazioni su come citare questa pagina"><span>Cita questa voce</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Speciale:UrlShortener&url=https%3A%2F%2Fit.wikipedia.org%2Fwiki%2F91_%28numero%29"><span>Ottieni URL breve</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Speciale:QrCode&url=https%3A%2F%2Fit.wikipedia.org%2Fwiki%2F91_%28numero%29"><span>Scarica codice QR</span></a></li> </ul> </div> </div> <div id="p-coll-print_export" class="vector-menu mw-portlet mw-portlet-coll-print_export" > <div class="vector-menu-heading"> Stampa/esporta </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="coll-create_a_book" class="mw-list-item"><a href="/w/index.php?title=Speciale:Libro&bookcmd=book_creator&referer=91+%28numero%29"><span>Crea un libro</span></a></li><li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Speciale:DownloadAsPdf&page=91_%28numero%29&action=show-download-screen"><span>Scarica come PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=91_(numero)&printable=yes" title="Versione stampabile di questa pagina [p]" accesskey="p"><span>Versione stampabile</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> In altri progetti </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="wb-otherproject-link wb-otherproject-commons mw-list-item"><a href="https://commons.wikimedia.org/wiki/Category:91_(number)" hreflang="en"><span>Wikimedia Commons</span></a></li><li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q690992" title="Collegamento all'elemento connesso dell'archivio dati [g]" accesskey="g"><span>Elemento Wikidata</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Strumenti pagine"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Aspetto"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Aspetto</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">sposta nella barra laterale</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">nascondi</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">Da Wikipedia, l'enciclopedia libera.</div> </div> <div id="contentSub"><div id="mw-content-subtitle"><span class="mw-redirectedfrom">(Reindirizzamento da <strong><a href="/w/index.php?title=Novantuno&redirect=no" class="mw-redirect" title="Novantuno">Novantuno</a></strong>)</span></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="it" dir="ltr"><style data-mw-deduplicate="TemplateStyles:r130658281">body:not(.skin-minerva) .mw-parser-output .hatnote.nota-disambigua{clear:both;margin-top:0;padding:.05em .5em}</style> <style data-mw-deduplicate="TemplateStyles:r139142988">.mw-parser-output .hatnote-content{align-items:center;display:flex}.mw-parser-output .hatnote-icon{flex-shrink:0}.mw-parser-output .hatnote-icon img{display:flex}.mw-parser-output .hatnote-text{font-style:italic}body:not(.skin-minerva) .mw-parser-output .hatnote{border:1px solid #CCC;display:flex;margin:.5em 0;padding:.2em .5em}body:not(.skin-minerva) .mw-parser-output .hatnote-text{padding-left:.5em}body.skin-minerva .mw-parser-output .hatnote-icon{padding-right:8px}body.skin-minerva .mw-parser-output .hatnote-icon img{height:auto;width:16px}body.skin--responsive .mw-parser-output .hatnote a.new{color:#d73333}body.skin--responsive .mw-parser-output .hatnote a.new:visited{color:#a55858}</style> <div class="hatnote noprint nota-disambigua"> <div class="hatnote-content"><span class="noviewer hatnote-icon" typeof="mw:File"><span><img src="//upload.wikimedia.org/wikipedia/commons/thumb/b/bc/Nota_disambigua.svg/18px-Nota_disambigua.svg.png" decoding="async" width="18" height="18" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/bc/Nota_disambigua.svg/27px-Nota_disambigua.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/bc/Nota_disambigua.svg/36px-Nota_disambigua.svg.png 2x" data-file-width="200" data-file-height="200" /></span></span> <span class="hatnote-text"><a href="/wiki/Aiuto:Disambiguazione" title="Aiuto:Disambiguazione">Disambiguazione</a> – "Novantuno" rimanda qui. Se stai cercando altri significati, vedi <b><a href="/wiki/91_(disambigua)" class="mw-disambig" title="91 (disambigua)">91 (disambigua)</a></b>.</span></div> </div> <table class="infobox sinottico" summary="Tabella sinottica che riassume i principali dati del soggetto"><tbody><tr class="sinottico_testata"><th colspan="2" style="background:#C0C0FF">91</th></tr><tr><th><a href="/wiki/Numero_cardinale" title="Numero cardinale">Cardinale</a></th><td>Novantuno </td></tr><tr><th><a href="/wiki/Numero_ordinale" title="Numero ordinale">Ordinale</a></th><td>Novantunesimo, -a </td></tr><tr><th><a href="/wiki/Fattorizzazione" title="Fattorizzazione">Fattori</a></th><td>91 = 7 × 13 </td></tr><tr><th><a href="/wiki/Sistema_di_numerazione_romano" title="Sistema di numerazione romano">Numero romano</a></th><td>XCI </td></tr><tr><th><a href="/wiki/Sistema_numerico_binario" title="Sistema numerico binario">Numero binario</a></th><td>1011011 </td></tr><tr><th><a href="/wiki/Sistema_numerico_esadecimale" title="Sistema numerico esadecimale">Numero esadecimale</a></th><td>5B </td></tr><tr class="sinottico_divisione"><th colspan="2" style="background:#D2D2FF">Valori di funzioni aritmetiche</th></tr><tr><td class="sinottico_testo_centrale" colspan="2">  <table style="width:100%;"> <tbody><tr> <td><a href="/wiki/Funzione_%CF%86_di_Eulero" title="Funzione φ di Eulero">φ(91)</a> = 72 </td> <td><a href="/wiki/Funzione_tau_sui_positivi" title="Funzione tau sui positivi">τ(91)</a> = 4 </td> <td><a href="/wiki/Funzione_sigma" title="Funzione sigma">σ(91)</a> = 112 </td></tr> <tr> <td><a href="/wiki/Funzione_enumerativa_dei_primi" title="Funzione enumerativa dei primi">π(91)</a> = 24 </td> <td><a href="/wiki/Funzione_di_M%C3%B6bius" title="Funzione di Möbius">μ(91)</a> = 1 </td> <td><a href="/wiki/Funzione_di_Mertens" title="Funzione di Mertens"><i>M</i>(91)</a> = -1 </td></tr></tbody></table> </td></tr></tbody></table> <p><b>Novantuno</b> (91) è il numero naturale dopo il <a href="/wiki/90_(numero)" title="90 (numero)">90</a> e prima del <a href="/wiki/92_(numero)" title="92 (numero)">92</a>. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Proprietà_matematiche"><span id="Propriet.C3.A0_matematiche"></span>Proprietà matematiche</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=91_(numero)&veaction=edit&section=1" title="Modifica la sezione Proprietà matematiche" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=91_(numero)&action=edit&section=1" title="Edit section's source code: Proprietà matematiche"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li>È un <a href="/wiki/Numero_dispari" class="mw-redirect" title="Numero dispari">numero dispari</a>.</li> <li>È un <a href="/wiki/Numero_composto" title="Numero composto">numero composto</a>, con i seguenti <a href="/wiki/Divisori" class="mw-redirect" title="Divisori">divisori</a>: <a href="/wiki/1_(numero)" title="1 (numero)">1</a>, <a href="/wiki/7_(numero)" title="7 (numero)">7</a>, <a href="/wiki/13_(numero)" title="13 (numero)">13</a> e 91. Poiché la somma dei suoi divisori (escluso se stesso) è <a href="/wiki/21_(numero)" title="21 (numero)">21</a> < 91, è un <a href="/wiki/Numero_difettivo" title="Numero difettivo">numero difettivo</a>.</li> <li>È un <a href="/wiki/Numero_semiprimo" title="Numero semiprimo">numero semiprimo</a>.</li> <li>È un numero <a href="/wiki/Nontotiente" title="Nontotiente">nontotiente</a> in quanto dispari e diverso da 1.</li> <li>Può essere rappresentato in sei modi come figura geometrica. Infatti <ul><li>È il tredicesimo <a href="/wiki/Numero_triangolare" title="Numero triangolare">numero triangolare</a> e quindi somma dei primi tredici numeri interi naturali;</li> <li>Il settimo <a href="/wiki/Numero_esagonale" title="Numero esagonale">numero esagonale</a> e perfino un <a href="/wiki/Numero_esagonale_centrato" title="Numero esagonale centrato">numero esagonale centrato</a> (il sesto, e uno dei pochi numeri esagonali che sono anche centrati);</li> <li>Il quinto <a href="/wiki/Numero_ennagonale_centrato" title="Numero ennagonale centrato">numero ennagonale centrato</a></li> <li>Il sesto <a href="/wiki/Numero_piramidale_quadrato" title="Numero piramidale quadrato">numero piramidale quadrato</a> (quindi somma dei primi sei quadrati)</li> <li>Il quarto <a href="/wiki/Numero_cubico_centrato" title="Numero cubico centrato">numero cubico centrato</a> (quindi <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle 91=4^{3}+3^{3}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mn>91</mn> <mo>=</mo> <msup> <mn>4</mn> <mrow class="MJX-TeXAtom-ORD"> <mn>3</mn> </mrow> </msup> <mo>+</mo> <msup> <mn>3</mn> <mrow class="MJX-TeXAtom-ORD"> <mn>3</mn> </mrow> </msup> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle 91=4^{3}+3^{3}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/b4435636a0fd0a1fb8b073fa814055a8773f5f36" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.505ex; width:12.697ex; height:2.843ex;" alt="{\displaystyle 91=4^{3}+3^{3}}"></span>).</li></ul></li> <li>È un <a href="/wiki/Numero_a_cifra_ripetuta" title="Numero a cifra ripetuta">numero a cifra ripetuta</a> nel <a href="/wiki/Sistema_di_numerazione_posizionale" title="Sistema di numerazione posizionale">sistema di numerazione posizionale</a> a <a href="/wiki/Base_9" class="mw-redirect" title="Base 9">base 9</a> (111) e in quello a <a href="/wiki/Base_12" class="mw-redirect" title="Base 12">base 12</a> (77).</li> <li>È un <a href="/wiki/Numero_palindromo" title="Numero palindromo">numero palindromo</a> nel <a href="/wiki/Sistema_di_numerazione_posizionale" title="Sistema di numerazione posizionale">sistema di numerazione posizionale</a> a <a href="/wiki/Base_3" class="mw-redirect" title="Base 3">base 3</a> (10101).</li> <li>È un <a href="/wiki/Numero_felice" title="Numero felice">numero felice</a>.</li> <li>È un numero <a href="/wiki/Intero_privo_di_quadrati" title="Intero privo di quadrati">intero privo di quadrati</a>.</li> <li>È parte delle <a href="/wiki/Terne_pitagoriche" class="mw-redirect" title="Terne pitagoriche">terne pitagoriche</a> (35, 84, 91), (60, 91, 109), (91, 312, 325), (91, 588, 595), (91, 4140, 4141).</li></ul> <div class="mw-heading mw-heading2"><h2 id="Astronomia">Astronomia</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=91_(numero)&veaction=edit&section=2" title="Modifica la sezione Astronomia" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=91_(numero)&action=edit&section=2" title="Edit section's source code: Astronomia"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/91P/Russell" title="91P/Russell">91P/Russell</a> è una <a href="/wiki/Cometa_periodica" title="Cometa periodica">cometa periodica</a> del <a href="/wiki/Sistema_solare" title="Sistema solare">sistema solare</a>.</li> <li><a href="/wiki/91_Aegina" title="91 Aegina">91 Aegina</a> è un <a href="/wiki/Asteroide" title="Asteroide">asteroide</a> della <a href="/wiki/Fascia_principale" title="Fascia principale">fascia principale</a> del sistema solare.</li> <li><a href="/wiki/NGC_91" title="NGC 91">NGC 91</a> sono una <a href="/wiki/Galassia" title="Galassia">galassia</a> e una <a href="/wiki/Stella" title="Stella">stella</a> della <a href="/wiki/Andromeda_(costellazione)" title="Andromeda (costellazione)">costellazione di Andromeda</a>.</li></ul> <div class="mw-heading mw-heading2"><h2 id="Astronautica">Astronautica</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=91_(numero)&veaction=edit&section=3" title="Modifica la sezione Astronautica" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=91_(numero)&action=edit&section=3" title="Edit section's source code: Astronautica"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li>Cosmos 91 è un <a href="/wiki/Satellite_artificiale" title="Satellite artificiale">satellite artificiale</a> <a href="/wiki/Russia" title="Russia">russo</a>.</li></ul> <div class="mw-heading mw-heading2"><h2 id="Chimica">Chimica</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=91_(numero)&veaction=edit&section=4" title="Modifica la sezione Chimica" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=91_(numero)&action=edit&section=4" title="Edit section's source code: Chimica"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li>È il <a href="/wiki/Numero_atomico" title="Numero atomico">numero atomico</a> del <a href="/wiki/Protoattinio" title="Protoattinio">Protoattinio</a> (Pa), un <a href="/wiki/Attinide" class="mw-redirect" title="Attinide">attinide</a>.</li></ul> <div class="mw-heading mw-heading2"><h2 id="Altri_progetti">Altri progetti</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=91_(numero)&veaction=edit&section=5" title="Modifica la sezione Altri progetti" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=91_(numero)&action=edit&section=5" title="Edit section's source code: Altri progetti"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <div id="interProject" class="toccolours" style="display: none; clear: both; margin-top: 2em"><p id="sisterProjects" style="background-color: #efefef; color: black; font-weight: bold; margin: 0"><span>Altri progetti</span></p><ul title="Collegamenti verso gli altri progetti Wikimedia"> <li class="" title=""><a href="https://it.wiktionary.org/wiki/novantuno" class="extiw" title="wikt:novantuno">Wikizionario</a></li> <li class="" title=""><span class="plainlinks" title="commons:Category:91 (number)"><a class="external text" href="https://commons.wikimedia.org/wiki/Category:91_(number)?uselang=it">Wikimedia Commons</a></span></li></ul></div> <ul><li><span typeof="mw:File"><a href="https://it.wiktionary.org/wiki/" title="Collabora a Wikizionario"><img alt="Collabora a Wikizionario" src="//upload.wikimedia.org/wikipedia/commons/thumb/f/f9/Wiktionary_small.svg/18px-Wiktionary_small.svg.png" decoding="async" width="18" height="18" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/f9/Wiktionary_small.svg/27px-Wiktionary_small.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/f9/Wiktionary_small.svg/36px-Wiktionary_small.svg.png 2x" data-file-width="350" data-file-height="350" /></a></span> <a href="https://it.wiktionary.org/wiki/" class="extiw" title="wikt:">Wikizionario</a> contiene il lemma di dizionario «<b><a href="https://it.wiktionary.org/wiki/novantuno" class="extiw" title="wikt:novantuno">novantuno</a></b>»</li> <li><span typeof="mw:File"><a href="https://commons.wikimedia.org/wiki/?uselang=it" title="Collabora a Wikimedia Commons"><img alt="Collabora a Wikimedia Commons" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/18px-Commons-logo.svg.png" decoding="async" width="18" height="24" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/27px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/36px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></a></span> <span class="plainlinks"><a class="external text" href="https://commons.wikimedia.org/wiki/?uselang=it">Wikimedia Commons</a></span> contiene immagini o altri file su <b><span class="plainlinks"><a class="external text" href="https://commons.wikimedia.org/wiki/Category:91_(number)?uselang=it">novantuno</a></span></b></li></ul> <div class="noprint" style="width:100%; 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