| Nominal | 13987 |
| Cardinal | thirteen thousand nine hundred eighty-seven |
Cardinal thirteen thousand nine hundred eighty-seven | |
| Ordinal | 13,987th |
| Number of digits | 5 |
| Sum of digits | 28 |
| Product of digits | 1512 |
| Number parity | Odd |
| Prime factorization | 71 x 197 |
| Prime factors | 71, 197 |
| Number of distinct prime factors ω(n) | 2 |
| Total number of prime factors Ω(n) | 2 |
| Sum of prime factors | 268 |
| Product of prime factors | 13987 |
| Is 13987 a prime number? | No |
| Is 13987 a semiprime number? | Yes |
| Is 13987 a Chen prime number? | No |
| Is 13987 a Mersenne prime number? | No |
| Is 13987 a Catalan number? | No |
| Is 13987 a Fibonacci number? | No |
| Is 13987 a Idoneal number? | No |
| Square of 13987 (n2) | 195636169 |
| Cube of 13987 (n3) | 2736363095803 |
| Square root of 13987 | 118.26664787674 |
| Natural Logarithm (ln) of 13987 | 9.5458836057793 |
| Decimal Logarithm (log) of 13987 | 4.1457245748807 |
| Sine of 13987 | 0.58874569689094 |
| Cosecant of 13987 | 1.6985262147661 |
| Cosine of 13987 | 0.8083183187287 |
| Secant of 13987 | 1.2371363815839 |
| Tangent of 13987 | 0.72835872112475 |
| Cotangent of 13987 | 1.3729498542364 |
| The spelling of 13987 in words is "thirteen thousand nine hundred eighty-seven", meaning that: |
| 13987 is not an aban number (as it contains the letter a) |
| 13987 is not an eban number (as it contains the letter e) |
| 13987 is not an iban number (as it contains the letter i) |
| 13987 is not an oban number (as it contains the letter o) |
| 13987 is not a tban number (as it contains the letter t) |
| 13987 is not an uban number (as it contains the letter u) |
| Bengali numerals | ১৩৯৮৭ |
| Eastern Arabic numerals | ١٣٬٩٨٧ |
| Hieroglyphs numeralsused in Ancient Egypt | 𓂭𓆼𓆼𓆼𓍪𓎍𓐀 |
| Khmer numerals | ១៣៩៨៧ |
| Japanese numerals | 一万三千九百八十七 |
| Roman numerals | n/a |
| Thai numerals | ๑๓๙๘๗ |
| Arabic | ثلاثة عشر ألف و تسعة مائة و سبعة و ثمانون |
| Croatian | trinaest tisuća devetsto osamdeset i sedam |
| Czech | třináct tisíc devět set osmdesát sedm |
| Danish | tretten tusinde ni hundrede syv og firs |
| Dutch | dertienduizend negenhonderdzevenentachtig |
| Estonian | akpe wuietɔ̃ alafa asieke blaenyi vɔ adre |
| Faroese | trettan tusin og níggjuhundraðogáttatisjey |
| Filipino | labíng-tatlóng libó’t siyám na daán at walóng pû’t pitó |
| Finnish | kolmetoistatuhattayhdeksänsataakahdeksankymmentäseitsemän |
| French | treize mille neuf cent quatre-vingt-sept |
| Greek | δεκατρεις χίλιάδες εννιακόσια ογδόντα επτά |
| German | dreizehntausendneunhundertsiebenundachtzig |
| Hebrew | שלושה עשר אלף תשע מאות שמונים ושבע |
| Hindi | तेरह हज़ार नौ सौ सत्तासी |
| Hungarian | tizenháromezerkilencszáznyolcvanhét |
| Icelandic | þrettán þúsund og níuhundrað og áttatíu og sjó |
| Indonesian | tiga belas ribu sembilan ratus delapan puluh tujuh |
| Italian | tredicimilanovecentoottantasette |
| Japanese | 一万三千九百八十七 |
| Korean | 만 삼천구백팔십칠 |
| Latvian | trīspadsmit tūkstoši deviņsimt astoņdesmit septiņi |
| Lithuanian | trylika tūkstančių devyni šimtai aštuoniasdešimt septyni |
| Norwegian | tretten tusen ni hundre og åttisju |
| Persian | سیزده هزار و نهصد و هشتاد و هفت |
| Polish | trzynaście tysięcy dziewięćset osiemdziesiąt siedem |
| Portuguese | treze mil novecentos e oitenta e sete |
| Romanian | treisprezece mii nouă sute optzeci şi şapte |
| Russian | тринадцать тысяч девятьсот восемьдесят семь |
| Serbian | тринаест хиљада деветсто осамдесет и седам |
| Slovak | trinásť tisíc deväťsto osemdesiatsedem |
| Slovene | trinajst tisuću devetsto osemdeset sedem |
| Spanish | trece mil novecientos ochenta y siete |
| Swahili | elfu kumi na tatu, mia tisa na themanini na saba |
| Swedish | trettontusenniohundraåttiosju |
| Thai | หนึ่งหมื่นสามพันเก้าร้อยแปดสิบเจ็ด |
| Turkish | on üç bin dokuz yüz seksen yedi |
| Ukrainian | тринадцять тисяч девʼятсот вісімдесят сім |
| Vietnamese | mười ba nghìn chín trăm tám mươi bảy |
| Number 13987 reversed | 78931 | |
| Unicode Character | U+36A3 | 㚣 |
| Unix Timestamp | Thu, 01 Jan 1970 03:53:07 +0000 | |