Properties of the Number 11681

Eleven Thousand Six Hundred Eighty-One

Basics

Value: 11680 → 11681 → 11682

Parity: odd

Prime: Yes

Previous Prime: 11677

Next Prime: 11689

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 11681

Divisors: 1, 11681

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10110110100001

Octal: 26641

Duodecimal: 6915

Hexadecimal: 2da1

Square: 136445761

Square Root: 108.07867504739313

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

Primes which are the concatenation of two squares (in decimal notation). A167535

Primes of form n² + 10000. A256838

Primes for which the weight as defined in A117078 is 9 and the gap as defined in A001223 is 8. A118922

Number of integer partitions of n such that either the run-lengths or the negated run-lengths are unimodal. A332746

Numbers k such that k⁴ can be written as a sum of four positive 4th powers with no common factor. A39664

Father primes of order 5. A136074

n-th prime in the first occurrence of at least n consecutive primes of the form 4k + 1. A145986

Primes having only {1, 6, 8} as digits. A385782

Primes that yield a different prime when rotated by 180 degrees. A48890

Numbers n such that (40ⁿ + 1)/41 is prime. A229663