Properties of the Number -9087

Eighty-Seven

Basics

Value: -9088 → -9087 → -9086

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 3 × 13 × 233

Divisors: 1, 3, 13, 39, 233, 699, 3029, 9087

Polygonal

Triangular: No

Square: No

Pentagonal: Yes

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -10001101111111

Octal: -21577

Duodecimal: -5313

Hexadecimal: -237f

Square: 82573569

Square Root: 95.32575727472612

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

Pentagonal numbers with even index. A49452

Least k for the Theodorus spiral to complete n revolutions. A72895

a(n) = ∑_k=1..n k*φ(k). A11755

a(n) = n*(n + 1)*(3·n² + 3·n - 2)/8. A236770

A sequence of asymptotic density ζ(8) - 1, where ζ is the Riemann ζ function. A143034

Number of maximal subsets of {1..n} containing n such that every subset has a different sum. A325867

Number of plane regions after drawing (in general position) a convex n-gon and all its diagonals. A27927

a(n) = T(n,n-4), array T as in A055801. A55804

Starting numbers for which the RATS sequence has eventual period 14. A114615

Odd pentagonal numbers. A14632