Properties of the Number -931

Nine Hundred Thirty-One

Basics

Value: -932 → -931 → -930

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 7 ² × 19

Divisors: 1, 7, 19, 49, 133, 931

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1110100011

Octal: -1643

Duodecimal: -657

Hexadecimal: -3a3

Square: 866761

Square Root: 30.512292604784715

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, read by rows, where all columns of T are different and yet all columns of the matrix square T² (A118407) are equal; also equals the matrix inverse of triangle A118400. A118404

Expansion of -(2·x+1)*(6·x²+4·x+1)/((3·x²+3·x+1)*(2·x³+2·x²+4·x+1)). A110688

G.f.: ∑_n>=1 (-1)^n-1 * x^n²/(1 - xⁿ)ⁿ. A303506

Expansion of ∏_m>=1 (1-m·q^m)¹⁹. A22679

Expansion of (1-x)/(1-x-x²+2·x³). A78011

a(n) = ∑_k=0..n A011971(n, k) * (-2)^{n - k}. A367809

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 137", based on the 5-celled von Neumann neighborhood. A270277

Dirichlet g.f.: ζ(s-1) / (ζ(s) * ζ(s-2)). A328502

a(n) = numerator of the Y-coordinate of n·P where P is the generator [0,0] for rational points on the curve y² + y = x³ + x². A350624

(1/18)*Difference between concatenation of n and n² and concatenation of n² and n. A55435