Properties of the Number -139657

One Hundred Thirty-Nine Thousand Six Hundred Fifty-Seven

Basics

Value: -139658 → -139657 → -139656

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 7 × 71 × 281

Divisors: 1, 7, 71, 281, 497, 1967, 19951, 139657

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100010000110001001

Octal: -420611

Duodecimal: -689A1

Hexadecimal: -22189

Square: 19504077649

Square Root: 373.707104561848

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 and Lehmer numbers with parameters (1 +- sqrt(-7))/2. A107920

a(n) = -a(n-1) - 2·a(n-2). A1607

Expansion of (1 + 2·x)/(1 + 3·x + 4·x²). A87168

Row sums of the Riordan array (1-4·x+4·x², x*(1-2·x)) (A167431). A167433

a(n) is the unique odd positive solution·of 2ⁿ = 7x²+y². A77020

a(n) = 3·a(n-1) - 4·a(n-2) with a(0) = a(1) = 1. A247560

a(0)=1, a(1)=1; thereafter a(n) = -a(n-1) - 2·a(n-2). A169998

Expansion of (2 + x + x² + x³ - x⁴ - 2·x⁵ - 4·x⁶ - 8·x⁷) / (1 - x⁴ + 16·x⁸) in powers of x. A247487

Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 662", based on the 5-celled von Neumann neighborhood. A286759

a(n) = 3·a(n-2) - 4·a(n-4) with a(0) = 2, a(1) = 1, a(2) = 3, a(3) = 1. A247564