number.wiki
Number

2,687

2,687 is a prime, odd.

Cousin Prime Deficient Number Prime Sexy Prime Squarefree Twin Prime

Properties

Parity
Odd
Digit count
4
Digit sum
23
Digital root
5
Palindrome
No
Divisor count
2
σ(n) — sum of divisors
2,688

Primality

2,687 is prime. It has exactly two divisors: 1 and itself.

Divisors & multiples

All divisors (2)
1 · 2687
Aliquot sum (sum of proper divisors): 1
Factor pairs (a × b = 2,687)
1 × 2687
First multiples
2,687 · 5,374 · 8,061 · 10,748 · 13,435 · 16,122 · 18,809 · 21,496 · 24,183 · 26,870

Representations

In words
two thousand six hundred eighty-seven
Ordinal
2687th
Roman numeral
MMDCLXXXVII
Binary
101001111111
Octal
5177
Hexadecimal
A7F

Also seen as

Prime neighborhood

Adjacent primes:

  • Previous prime: 2,683 (gap of 4)
  • Next prime: 2,689 (gap of 2)

Pair status: twin with 2689, cousin with 2683.

Hex color
#000A7F
RGB(0, 10, 127)
IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.10.127.