Properties of the Number -489

Four Hundred Eighty-Nine

Basics

Value: -490 → -489 → -488

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 163

Divisors: 1, 3, 163, 489

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -111101001

Octal: -751

Duodecimal: -349

Hexadecimal: -1e9

Square: 239121

Square Root: 22.11334438749598

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

n minus the Heinz number of the conjugate of the integer partition with Heinz number n. A352491

Expansion of ψ(x³) / ψ(x) in powers of·where ψ() is a Ramanujan θ function. A101195

Triangle of coefficients T(n,k) in g.f. A(x,y) satisfying ∑_n=-oo..+oo (-1)ⁿ * (xⁿ + y·A(x,y))ⁿ = 1 + (y+2)*∑_n>=1 (-1)ⁿ * x^n², for n >= 1, as read by rows. A370040

a(n) = A000730(7·n). A282941

Expansion of (1+x)^1/3/(1+x-9·x⁴)^1/3. A98535

Coefficients of the A-Rogers-Selberg identity. A104408

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 315", based on the 5-celled von Neumann neighborhood. A271249

Expansion of (1-x)^-1/(1+x²-2·x³). A77887

a(n) = (n!)*2^n-1*mu_h(n) where mu_h is the hypergeometric Moebius function associated to the Dirichlet character modulo 4 h={1,0,-1,0,1,...} (see comment). A298510

Number of partitions of n into relatively prime parts. Also aperiodic partitions. A837