Number
981
981 is a composite number, odd, a calendar year.
Properties
- Parity
- Odd
- Digit count
- 3
- Digit sum
- 18
- Digital root
- 9
- Palindrome
- No
- Divisor count
- 6
- σ(n) — sum of divisors
- 1,430
Primality
Prime factorization: 3 2 × 109
Divisors & multiples
Aliquot sum (sum of proper divisors):
449
Representations
- In words
- nine hundred eighty-one
- Ordinal
- 981st
- Roman numeral
- CMLXXXI
- Binary
- 1111010101
- Octal
- 1725
- Hexadecimal
- 3D5
Also seen as
Unicode codepoint
ϕ
U+03D5
Lowercase letter (Ll)
UTF-8 encoding: CF 95 (2 bytes).
Hex color
#0003D5
RGB(0, 3, 213)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.3.213.