Properties of the Number 91287

Ninety-One Thousand Two Hundred Eighty-Seven

Basics

Value: 91286 → 91287 → 91288

Parity: odd

Prime: No

Previous Prime: 91283

Next Prime: 91291

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ⁴ × 7 ² × 23

Divisors: 1, 3, 7, 9, 21, 23, 27, 49, 63, 69

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10110010010010111

Octal: 262227

Duodecimal: 449B3

Hexadecimal: 16497

Square: 8333316369

Square Root: 302.1373859687013

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)=the sum of the (1,2)- and (1,3)-entries and twice the (1,4)-entry of the matrix Pⁿ + Tⁿ, where the 4 X 4 matrices P and T are defined by P=[0,1,0,0;0,0,1,0;0,0,0,1;1,0,0,0] and T=[0,1,0,0;0,0,1,0;0,0,0,1;1,0,0,1]. A109526

Numbers k such that (σ(k)+σ(k+1))/σ(2·k+1) is an integer, where σ = A000203. A91287