Number
99
99 is a composite number, odd, a calendar year.
Properties
- Parity
- Odd
- Digit count
- 2
- Digit sum
- 18
- Digital root
- 9
- Palindrome
- Yes
- Divisor count
- 6
- σ(n) — sum of divisors
- 156
Primality
Prime factorization: 3 2 × 11
Divisors & multiples
Aliquot sum (sum of proper divisors):
57
Representations
- In words
- ninety-nine
- Ordinal
- 99th
- Roman numeral
- XCIX
- Binary
- 1100011
- Octal
- 143
- Hexadecimal
- 63
Also seen as
ASCII character
As an ASCII codepoint, 99 is c. Printable ASCII character c.
Hex color
#000063
RGB(0, 0, 99)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.99.