Properties of the Number 11691

Eleven Thousand Six Hundred Ninety-One

Basics

Value: 11690 → 11691 → 11692

Parity: odd

Prime: No

Previous Prime: 11689

Next Prime: 11699

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ³ × 433

Divisors: 1, 3, 9, 27, 433, 1299, 3897, 11691

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10110110101011

Octal: 26653

Duodecimal: 6923

Hexadecimal: 2dab

Square: 136679481

Square Root: 108.1249277456406

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

Sum of squares of three consecutive primes. A133529

Numbers k such that numerator(Bernoulli(2·k)/(2·k)) is different from numerator(Bernoulli(2·k)/(2·k*(2·k-1))). A90495

Composites whose prime factorization in base 5 is an anagram of the number in base 5. A260049

Numbers k such that φ(k) is a perfect 5th power. A78165

a(n) = -3·a(n-1) + 9·a(n-2) + 3·a(n-3), with a(0)=3, a(1)=-3, a(2)=27. A215829

a(n) = 16n² + n. A157474

Mixed partitions of n. A2096

Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 646", based on the 5-celled von Neumann neighborhood. A283584

Odd composite integers m such that A006190(2·m-J(m,13)) == 1 (mod m), where J(m,13) is the Jacobi symbol. A340119

Table read by antidiagonals: Place k equally spaced points on each side of a regular n-gon and join every pair of these n·k points by a chord; T(n,k) (n >= 3, k >= 0) gives the number of regions in the resulting planar graph. A367304