# 7

 ← 6 7 8 →
Cardinalseven
Ordinal7th
(seventh)
Numeral systemseptenary
Factorizationprime
Prime4th
Divisors1, 7
Greek numeralΖ´
Roman numeralVII
Roman numeral (unicode)Ⅶ, ⅶ
Greek prefixhepta-/hept-
Latin prefixseptua-
Binary1112
Ternary213
Quaternary134
Quinary125
Senary116
Octal78
Duodecimal712
Vigesimal720
Base 36736
Greek numeralZ, ζ
Amharic
Arabic٧
Persian & Kurdish٧
Urdu
Bengali
Chinese numeral
Devanāgarī
Telugu
Tamil
Hebrewז
Khmer
Thai

7 (seven) is the natural number following 6 and preceding 8.

## Mathematics

In fact, if one sorts the digits in the number 142,857 in ascending order, 124578, it is possible to know from which of the digits the decimal part of the number is going to begin with. The remainder of dividing any number by 7 will give the position in the sequence 124578 that the decimal part of the resulting number will start. For example, 628 ÷ 7 = 89 5/7; here 5 is the remainder, and would correspond to number 7 in the ranking of the ascending sequence. So in this case, 628 ÷ 7 = 89.714285. Another example, 5238 ÷ 7 = 748 2/7, hence the remainder is 2, and this corresponds to number 2 in the sequence. In this case, 5238 ÷ 7 = 748.285714.
Graph of the probability distribution of the sum of 2 six-sided dice

### Basic calculations

Multiplication 1 2 3 4 5 6 7 8 9 10 15 25 50 100 1000
7 × x 7 14 21 28 35 42 49 56 63 70 105 175 350 700 7000
Division 1 2 3 4 5 6 7 8 9 10
11 12 13 14 15
7 ÷ x 7 3.5 2.3 1.75 1.4 1.16 1 0.875 0.7 0.7
0.63 0.583 0.538461 0.5 0.46
x ÷ 7 0.142857 0.285714 0.428571 0.571428 0.714285 0.857142 1 1.142857 1.285714 1.428571
1.571428 1.714285 1.857142 2 2.142857
Exponentiation 1 2 3 4 5 6 7 8 9 10
7x 7 49 343 2401 16807 117649 823543 5764801 40353607 282475249
x7 1 128 2187 16384 78125 279936 823543 2097152 4782969 10000000
Radix 1 5 10 15 20 25 30 40 50 60 70 80 90 100
110 120 130 140 150 200 250 500 1000 10000 100000 1000000
x7 1 5 137 217 267 347 427 557 1017 1147 1307 1437 1567 2027
2157 2317 2447 2607 3037 4047 5057 13137 26267 411047 5643557 113333117
Other Languages
አማርኛ: ሰባት
Ænglisc: Seofon
العربية: 7 (عدد)
ܐܪܡܝܐ: 7 (ܡܢܝܢܐ)
অসমীয়া:
asturianu: Siete
Avañe'ẽ: Pokõi
авар: Анкьго
azərbaycanca: 7 (ədəd)
تۆرکجه: ۷ (سایی)
Bân-lâm-gú: 7
башҡортса: Ете (һан)
беларуская: 7 (лік)
беларуская (тарашкевіца)‎: 7 (лік)
Bislama: Seven
български: 7 (число)
བོད་ཡིག: ༧ (གྲངས་ཀ།)
brezhoneg: Seizh (niver)
català: Nombre set
Чӑвашла: 7 (хисеп)
Cebuano: 7 (numero)
čeština: 7 (číslo)
chiShona: Nomwe
chiTumbuka: Vikhondi na tubili
Cymraeg: Saith
dansk: 7 (tal)
Deitsch: Siwwe
Deutsch: Sieben
eesti: Seitse
Ελληνικά: 7 (αριθμός)
emiliàn e rumagnòl: 7 (nùmer)
español: Siete
Esperanto: 7 (nombro)
euskara: Zazpi
فارسی: ۷ (عدد)
føroyskt: 7 (tal)
français: 7 (nombre)
Fulfulde: Joweeɗiɗi
furlan: 7 (numar)
Gaeilge: 7 (uimhir)
galego: Sete

한국어: 7
Hausa: Bakwai
հայերեն: Յոթ
hrvatski: Sedam
Igbo: Asaa
Bahasa Indonesia: 7 (angka)
interlingua: 7 (numero)
isiXhosa: Sixhenxe
íslenska: Sjö
italiano: 7 (numero)
עברית: 7 (מספר)
ಕನ್ನಡ: ಏಳು
ქართული: 7 (რიცხვი)
қазақша: 7 (сан)
Kirundi: Indwi
Kiswahili: Saba (namba)
коми: 7 (сизим)
Kreyòl ayisyen: 7 (nonm)
kurdî: Heft
лакку: Арулва
Latina: Septem
latviešu: 7 (skaitlis)
Lëtzebuergesch: Siwen
lietuvių: 7 (skaičius)
Limburgs: Zeuve
lingála: Sambo
Luganda: Musanvu
lumbaart: Nümar 7
magyar: 7 (szám)
македонски: 7 (број)
മലയാളം: 7 (അക്കം)
მარგალური: შკვითი
Bahasa Melayu: 7 (nombor)
Mìng-dĕ̤ng-ngṳ̄: 7
Nāhuatl: Chicōme
Na Vosa Vakaviti: Vitu
Nederlands: 7 (getal)
Nēhiyawēwin / ᓀᐦᐃᔭᐍᐏᐣ: Wikipedia:Archives/ᓃᐧᔖᔥᒡ

Napulitano: Sette
Nordfriisk: Sööwen
norsk: 7 (tall)
norsk nynorsk: Talet 7
ଓଡ଼ିଆ: ୭ (ସଂଖ୍ୟା)
oʻzbekcha/ўзбекча: 7 (son)
ਪੰਜਾਬੀ: 7
پنجابی: 7
پښتو: ۷
Перем Коми: 7 (сизим)
polski: 7 (liczba)
português: Sete
română: 7 (cifră)
Runa Simi: Qanchis
русский: 7 (число)
ᱥᱟᱱᱛᱟᱲᱤ:
Gagana Samoa: 7 (numera)
Scots: 7 (nummer)
Sesotho sa Leboa: 7 (nomoro)
sicilianu: Setti
Simple English: 7 (number)
slovenčina: 7 (číslo)
slovenščina: 7 (število)
ślůnski: 7 (nůmera)
Soomaaliga: 7 (tiro)
کوردی: ٧ (ژمارە)
Sranantongo: Numro 7
српски / srpski: 7 (број)
srpskohrvatski / српскохрватски: 7 (broj)
suomi: 7 (luku)
svenska: 7 (tal)
Tagalog: 7 (bilang)
தமிழ்: 7 (எண்)
татарча/tatarça: 7 (сан)
తెలుగు: ఏడు
ไทย: 7
ትግርኛ: ሸውዓተ
Tshivenda: Ṱhanu na mbili
Türkçe: 7 (sayı)
Türkmençe: 7 (san)
тыва дыл: 7
ᨅᨔ ᨕᨘᨁᨗ: 7 (nomoro)
українська: 7 (число)
اردو: 7 (عدد)
Vahcuengh: 7
vepsän kel’: 7 (lugu)
Tiếng Việt: 7 (số)
West-Vlams: 7 (getal)
Winaray: 7 (ihap)
Xitsonga: Nkombo
ייִדיש: 7 (נומער)