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Number

4,091

4,091 is a prime, odd.

Deficient Number Prime Squarefree Twin Prime

Properties

Parity
Odd
Digit count
4
Digit sum
14
Digital root
5
Palindrome
No
Divisor count
2
σ(n) — sum of divisors
4,092

Primality

4,091 is prime. It has exactly two divisors: 1 and itself.

Divisors & multiples

All divisors (2)
1 · 4091
Aliquot sum (sum of proper divisors): 1
Factor pairs (a × b = 4,091)
1 × 4091
First multiples
4,091 · 8,182 · 12,273 · 16,364 · 20,455 · 24,546 · 28,637 · 32,728 · 36,819 · 40,910

Representations

In words
four thousand ninety-one
Ordinal
4091st
Binary
111111111011
Octal
7773
Hexadecimal
FFB

Also seen as

Prime neighborhood

Adjacent primes:

  • Previous prime: 4,079 (gap of 12)
  • Next prime: 4,093 (gap of 2)

Pair status: twin with 4093.

Hex color
#000FFB
RGB(0, 15, 251)
IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.15.251.