Properties of the Number 11987

Eleven Thousand Nine Hundred Eighty-Seven

Basics

Value: 11986 → 11987 → 11988

Parity: odd

Prime: Yes

Previous Prime: 11981

Next Prime: 12007

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 11987

Divisors: 1, 11987

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10111011010011

Octal: 27323

Duodecimal: 6B2B

Hexadecimal: 2ed3

Square: 143688169

Square Root: 109.48515881159419

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Lower prime of a difference of 20 between consecutive primes. A31938

The sums of pairs of adjacent terms are the odd palindromic primes in ascending order. A181881

Numbers k such that 10^k + 987654321 is prime. A248351

Primes of the form 666·k - 1. A63472

a(n) is the smallest prime of the form n·m^q - 1 where m is an integer > 1 and q >= 2. A213740

Primes p such that 2 is a primitive root modulo p while 8192 is not. A323590

First occurrence of primes in the progression k·x²-1. A90688

Number of A095745-primes in range ]2ⁿ,2ⁿ⁺¹]. A95755

Primes congruent to 36 mod 37. A142145

Primes congruent to 15 mod 41. A142212