| Nominal | 7999 |
| Cardinal | seven thousand nine hundred ninety-nine |
Cardinal seven thousand nine hundred ninety-nine | |
| Ordinal | 7,999th |
| Number of digits | 4 |
| Sum of digits | 34 |
| Product of digits | 5103 |
| Number parity | Odd |
| Prime factorization | 19 x 421 |
| Prime factors | 19, 421 |
| Number of distinct prime factors ω(n) | 2 |
| Total number of prime factors Ω(n) | 2 |
| Sum of prime factors | 440 |
| Product of prime factors | 7999 |
| Is 7999 a prime number? | No |
| Is 7999 a semiprime number? | Yes |
| Is 7999 a Chen prime number? | No |
| Is 7999 a Mersenne prime number? | No |
| Is 7999 a Catalan number? | No |
| Is 7999 a Fibonacci number? | No |
| Is 7999 a Idoneal number? | No |
| Square of 7999 (n2) | 63984001 |
| Cube of 7999 (n3) | 511808023999 |
| Square root of 7999 | 89.437128755344 |
| Natural Logarithm (ln) of 7999 | 8.9870718128488 |
| Decimal Logarithm (log) of 7999 | 3.9030356967885 |
| Sine of 7999 | 0.4838984211859 |
| Cosecant of 7999 | 2.0665494166095 |
| Cosine of 7999 | 0.87512417288851 |
| Secant of 7999 | 1.1426949808726 |
| Tangent of 7999 | 0.55294829714131 |
| Cotangent of 7999 | 1.8084873489437 |
| The spelling of 7999 in words is "seven thousand nine hundred ninety-nine", meaning that: |
| 7999 is not an aban number (as it contains the letter a) |
| 7999 is not an eban number (as it contains the letter e) |
| 7999 is not an iban number (as it contains the letter i) |
| 7999 is not an oban number (as it contains the letter o) |
| 7999 is not a tban number (as it contains the letter t) |
| 7999 is not an uban number (as it contains the letter u) |
| Bengali numerals | ৭৯৯৯ |
| Eastern Arabic numerals | ٧٬٩٩٩ |
| Hieroglyphs numeralsused in Ancient Egypt | 𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍪𓎎𓐂 |
| Khmer numerals | ៧៩៩៩ |
| Japanese numerals | 七千九百九十九 |
| Roman numerals | n/a |
| Thai numerals | ๗๙๙๙ |
| Arabic | سبعة آلاف و تسعة مائة و تسعة و تسعون |
| Croatian | sedam tisuća devetsto devedeset i devet |
| Czech | sedm tisíc devět set devadesát devět |
| Danish | syv tusinde ni hundrede ni og halvfems |
| Dutch | zevenduizend negenhonderdnegenennegentig |
| Estonian | akpe adre alafa asieke blaasieke vɔ asieke |
| Faroese | sjey tusin og níggjuhundraðognítiníggju |
| Filipino | pitóng libó’t siyám na daán at siyám na pû’t siyám |
| Finnish | seitsemäntuhattayhdeksänsataayhdeksänkymmentäyhdeksän |
| French | sept mille neuf cent quatre-vingt-dix-neuf |
| Greek | επτά χίλιάδες εννιακόσια εννενήντα εννέα |
| German | siebentausendneunhundertneunundneunzig |
| Hebrew | שבעת אלפים תשע מאות תשעים ותשע |
| Hindi | सात हज़ार नौ सौ निन्यानबे |
| Hungarian | hétezerkilencszázkilencvenkilenc |
| Icelandic | sjó þúsund og níuhundrað og níutíu og níu |
| Indonesian | tujuh ribu sembilan ratus sembilan puluh sembilan |
| Italian | settemilanovecentonovantanove |
| Japanese | 七千九百九十九 |
| Korean | 칠천구백구십구 |
| Latvian | septiņtūkstoš deviņsimt deviņdesmit deviņi |
| Lithuanian | septyni tūkstančiai devyni šimtai devyniasdešimt devyni |
| Norwegian | sju tusen ni hundre og nittini |
| Persian | هفت هزار و نهصد و نود و نه |
| Polish | siedem tysięcy dziewięćset dziewięćdziesiąt dziewięć |
| Portuguese | sete mil novecentos e noventa e nove |
| Romanian | şapte mii nouă sute nouăzeci şi nouă |
| Russian | семь тысяч девятьсот девяносто девять |
| Serbian | седам хиљада деветсто деведесет и девет |
| Slovak | sedem tisíc deväťsto deväťdesiatdeväť |
| Slovene | sedem tisuću devetsto devetdeset devet |
| Spanish | siete mil novecientos noventa y nueve |
| Swahili | elfu saba, mia tisa na tisini na tisa |
| Swedish | sjutusenniohundranittionio |
| Thai | เจ็ดพันเก้าร้อยเก้าสิบเก้า |
| Turkish | yedi bin dokuz yüz doksan dokuz |
| Ukrainian | сім тисяч девʼятсот девʼяносто девʼять |
| Vietnamese | bảy nghìn chín trăm chín mươi chín |
| Number 7999 reversed | 9997 | |
| Unicode Character | U+1F3F | Ἷ |
| Unix Timestamp | Thu, 01 Jan 1970 02:13:19 +0000 | |