Number
491
491 is a prime, odd, a calendar year.
Properties
- Parity
- Odd
- Digit count
- 3
- Digit sum
- 14
- Digital root
- 5
- Palindrome
- No
- Divisor count
- 2
- σ(n) — sum of divisors
- 492
Primality
491 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Aliquot sum (sum of proper divisors):
1
Representations
- In words
- four hundred ninety-one
- Ordinal
- 491st
- Roman numeral
- CDXCI
- Binary
- 111101011
- Octal
- 753
- Hexadecimal
- 1EB
Also seen as
Prime neighborhood
Unicode codepoint
ǫ
U+01EB
Lowercase letter (Ll)
UTF-8 encoding: C7 AB (2 bytes).
Hex color
#0001EB
RGB(0, 1, 235)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.1.235.