Properties of the Number -887

Eight Hundred Eighty-Seven

Basics

Value: -888 → -887 → -886

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 887

Divisors: 1, 887

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1101110111

Octal: -1567

Duodecimal: -61B

Hexadecimal: -377

Square: 786769

Square Root: 29.782545223670862

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

a(n) = -n² + 9·n + 23. A126719

Expansion of x²*(-3+4·x)/(1-x³+x⁴). A110061

Row sums of signed triangle A062139 (generalized a=2 Laguerre). A62197

Alternating row sums of array A090438 ((4,2)-Stirling2). A90439

Expansion of (χ(q³) / χ(q))⁶ + q / (χ(q³) / χ(q))⁶ in powers of q where χ() is a Ramanujan θ function. A156215

Values of n such that L(3) and N(3) are both prime, where L(k) = (n²+n+1)*2^2·k + (2·n+1)*2^k + 1, N(k) = (n²+n+1)*2^k + n. A226923

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 49", based on the 5-celled von Neumann neighborhood. A270017

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 307", based on the 5-celled von Neumann neighborhood. A271167

cos(arctanh(x)*cos(x))=1-1/2!*x²+5/4!*x⁴-85/6!*x⁶-887/8!*x⁸... A12743

exp(cosh(x)*arctan(x))=1+x+1/2!*x²+2/3!*x³+5/4!*x⁴+20/5!*x⁵... A12768