Properties of the Number -87087

Eighty-Seven Thousand Eighty-Seven

Basics

Value: -87088 → -87087 → -87086

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 3 × 7 × 11 × 13 × 29

Divisors: 1, 3, 7, 11, 13, 21, 29, 33, 39, 77

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -10101010000101111

Octal: -252057

Duodecimal: -42493

Hexadecimal: -1542f

Square: 7584145569

Square Root: 295.10506603581035

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

Numbers k such that σ(k) = 4*φ(k). A68390

Numbers k that, when expressed in base 4 and then interpreted in base 9, give a multiple of k. A62925

Integers n such that σ(n)/φ(n) is a perfect square. A293391

Numbers n such that the arithmetic, geometric and harmonic means of φ(n) and σ(n) are all integers. A65146

Numbers k such that both k and 2·k are balanced numbers (A020492). A76375

Numbers k such that k, 2·k and 4·k are balanced numbers (A020492). A76376

Odd integers m such that φ(m) | σ(m). A15715

Numbers k such that k, 2·k, 4·k and 8·k are balanced numbers (A020492). A76377

Numbers n such that the middle coefficient of the cyclotomic polynomial Phi_n(x) has a value not obtained for any smaller n. A95877

a(n) = Catalan(n+1)*Bell(n). A289680