Number
309
309 is a composite number, odd, a calendar year.
Properties
- Parity
- Odd
- Digit count
- 3
- Digit sum
- 12
- Digital root
- 3
- Palindrome
- No
- Divisor count
- 4
- σ(n) — sum of divisors
- 416
Primality
Prime factorization: 3 × 103
Divisors & multiples
Aliquot sum (sum of proper divisors):
107
Representations
- In words
- three hundred nine
- Ordinal
- 309th
- Roman numeral
- CCCIX
- Binary
- 100110101
- Octal
- 465
- Hexadecimal
- 135
Also seen as
Unicode codepoint
ĵ
U+0135
Lowercase letter (Ll)
UTF-8 encoding: C4 B5 (2 bytes).
Hex color
#000135
RGB(0, 1, 53)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.1.53.