Properties of the Number -131989

One Hundred Thirty-One Thousand Nine Hundred Eighty-Nine

Basics

Value: -131990 → -131989 → -131988

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 11 × 13 ² × 71

Divisors: 1, 11, 13, 71, 143, 169, 781, 923, 1859, 10153

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100000001110010101

Octal: -401625

Duodecimal: -64471

Hexadecimal: -20395

Square: 17421096121

Square Root: 363.30290392453514

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

a(n) is the least odd number m minimizing A007947(m*(2ⁿ-m)). A143700

a(n) = (a(n-1)+1)*(a(n-3)+1)/a(n-4) for n > 3, a(0) = a(1) = a(2) = a(3) = 1. A276308