number.wiki
Number

6,991

6,991 is a prime, odd.

Deficient Number Prime Sexy Prime Squarefree

Properties

Parity
Odd
Digit count
4
Digit sum
25
Digital root
7
Palindrome
No
Divisor count
2
σ(n) — sum of divisors
6,992

Primality

6,991 is prime. It has exactly two divisors: 1 and itself.

Divisors & multiples

All divisors (2)
1 · 6991
Aliquot sum (sum of proper divisors): 1
Factor pairs (a × b = 6,991)
1 × 6991
First multiples
6,991 · 13,982 · 20,973 · 27,964 · 34,955 · 41,946 · 48,937 · 55,928 · 62,919 · 69,910

Representations

In words
six thousand nine hundred ninety-one
Ordinal
6991st
Binary
1101101001111
Octal
15517
Hexadecimal
1B4F

Also seen as

Prime neighborhood

Adjacent primes:

  • Previous prime: 6,983 (gap of 8)
  • Next prime: 6,997 (gap of 6)

Pair status: sexy with 6997.

Unicode codepoint
U+1B4F
Other punctuation (Po)

UTF-8 encoding: E1 AD 8F (3 bytes).

Hex color
#001B4F
RGB(0, 27, 79)
IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.27.79.