999 (number)

This article is about the natural number. For the emergency telephone number, see 999 (emergency telephone number). For other uses, see 999 (disambiguation).
← 998 999 1000 →
Cardinal Nine hundred [and] ninety-nine
Ordinal 999th
(Nine hundred [and] ninety-ninth)
Factorization 33× 37
Divisors 1, 3, 9, 27, 37, 111, 333, 999
Roman numeral CMXCIX
Binary 11111001112
Ternary 11010003
Quaternary 332134
Quinary 124445
Senary 43436
Octal 17478
Duodecimal 6B312
Hexadecimal 3E716
Vigesimal 29J20
Base 36 RR36

Nine hundred and ninety-nine is the natural number following nine hundred ninety-eight and preceding one thousand. 999 is a Harshad number, a Kaprekar number, a repdigit in bases 10 and 36, and a palindromic number in bases 10, 14, and 36. It is the largest 3 digit whole number in base 10. A particularly interesting quality of the largest base 10 3 digit number is if subtracting the base 10 number 2 and then add and every other positive integer up to infinity you get 5993/12 instead of an astronomically larger number.