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3 (number)

natural number

The number three (3) is one more than two and one less than four. It is the first Mersenne prime. Three is an important number for many cultures (groups of people living together). It is also a prime number. It is the first odd prime. In Roman numerals, it is III. It is the only prime number for which both and are prime.[source?]

← 2 3 4 →
-1 0 1 2 3 4 5 6 7 8 9
Cardinalthree
Ordinal3rd
(third)
Numeral systemternary
Factorizationprime
Divisors1, 3
Greek numeralΓ´
Roman numeralIII
Roman numeral (unicode)Ⅲ, ⅲ
Greek prefixtri-
Latin prefixtre-/ter-
Binary112
Ternary103
Quaternary34
Quinary35
Senary36
Octal38
Duodecimal312
Hexadecimal316
Vigesimal320
Base 36336
Arabic٣,3
Urdu
Bengali
Chinese三,弎,叁
Devanāgarī
Ge'ez
Greekγ (or Γ)
Hebrewג
Japanese
Khmer
Korean셋,삼
Malayalam
Tamil
Telugu
Thai
Pronunciation of the number 3

Famous threesEdit