Properties of the Number -191807

One Hundred Ninety-One Thousand Eight Hundred Seven

Basics

Value: -191808 → -191807 → -191806

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 7 × 11 × 47 × 53

Divisors: 1, 7, 11, 47, 53, 77, 329, 371, 517, 583

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -101110110100111111

Octal: -566477

Duodecimal: -92BBB

Hexadecimal: -2ed3f

Square: 36789925249

Square Root: 437.9577605203497

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

Lucas-Carmichael numbers: squarefree composite numbers k such that p | k => p+1 | k+1. A6972

Lucas-Carmichael numbers with 4 prime factors. A216926

Least Lucas-Carmichael number whose Dedekind ψ value is an n-th power. A292573

a(n) is the smallest k such that τ(k² + 1) is equal to 2ⁿ, where τ = A000005 and a(n) = -1 if no such k exists. A380969