number.wiki
Number

99

99 is a composite number, odd, a calendar year.

Deficient Number Kaprekar Number Palindrome Repdigit 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

All divisors (6)
1 · 3 · 9 · 11 · 33 · 99
Aliquot sum (sum of proper divisors): 57
Factor pairs (a × b = 99)
1 × 99
3 × 33
9 × 11
First multiples
99 · 198 · 297 · 396 · 495 · 594 · 693 · 792 · 891 · 990

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.