Properties of the Number -131391

One Hundred Thirty-One Thousand Three Hundred Ninety-One

Basics

Value: -131392 → -131391 → -131390

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 13 × 1123

Divisors: 1, 3, 9, 13, 39, 117, 1123, 3369, 10107, 14599

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -100000000100111111

Octal: -400477

Duodecimal: -64053

Hexadecimal: -2013f

Square: 17263594881

Square Root: 362.47896490693086

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

Triangle T(n, k) = k⁴ - n⁴ + 2·k*n*(1 - k²*n²), read by rows. A123963

a(n) = ∑_k=1..n 2^floor(n/k - 1). A345028

Indices of primes in sequence defined by A(0) = 77, A(n) = 10·A(n-1) - 43 for n > 0. A56257

From discordant permutations. A2634