number.wiki
Number

999

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

Deficient Number Harshad / Niven Kaprekar Number Palindrome Repdigit Year

Properties

Parity
Odd
Digit count
3
Digit sum
27
Digital root
9
Palindrome
Yes
Divisor count
8
σ(n) — sum of divisors
1,520

Primality

Prime factorization: 3 3 × 37

Divisors & multiples

All divisors (8)
1 · 3 · 9 · 27 · 37 · 111 · 333 · 999
Aliquot sum (sum of proper divisors): 521
Factor pairs (a × b = 999)
1 × 999
3 × 333
9 × 111
27 × 37
First multiples
999 · 1,998 · 2,997 · 3,996 · 4,995 · 5,994 · 6,993 · 7,992 · 8,991 · 9,990

Representations

In words
nine hundred ninety-nine
Ordinal
999th
Roman numeral
CMXCIX
Binary
1111100111
Octal
1747
Hexadecimal
3E7

Also seen as

Unicode codepoint
ϧ
U+03E7
Lowercase letter (Ll)

UTF-8 encoding: CF A7 (2 bytes).

Hex color
#0003E7
RGB(0, 3, 231)
IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.3.231.