Properties of the Number -279

Two Hundred Seventy-Nine

Basics

Value: -280 → -279 → -278

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 31

Divisors: 1, 3, 9, 31, 93, 279

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100010111

Octal: -427

Duodecimal: -1B3

Hexadecimal: -117

Square: 77841

Square Root: 16.703293088490067

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

Almkvist-Zudilin numbers: ∑_k=0..n (-1)^n-k * ((3^n-3·k * (3·k)!) / (k!)³) * binomial(n,3·k) * binomial(n+k,k). A125143

a(n) = a(n-1) - a(n-3) with a(1)=0, a(2)=0, a(3)=1. A50935

Triangle of coefficients of a version of the Hermite polynomials defined by P(x, n) = x·P(x, n - 1) - n·P(x, n - 2). A137286

Expansion of 1/(1-x*(1-5·x)). A106854

Expansion of (1+x)/(1+x-x³) in powers of x. A176971

Expansion of 1/(1-x+2·x²-x³) in powers of x. A77954

The r-th term of the n-th row of the following array contains the sum of r successively decreasing integers beginning from n. 0 < r <= n. Sequence contains the leading diagonal. A110427

Expansion of 1 / (1 + x - x³) in powers of x. A247917

Coefficients of x/(1+3·x+3·x²-x³). A108369

Row sums of number triangle A185962. A185963