Properties of the Number 91839

Ninety-One Thousand Eight Hundred Thirty-Nine

Basics

Value: 91838 → 91839 → 91840

Parity: odd

Prime: No

Previous Prime: 91837

Next Prime: 91841

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 3 × 11 ³ × 23

Divisors: 1, 3, 11, 23, 33, 69, 121, 253, 363, 759

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10110011010111111

Octal: 263277

Duodecimal: 45193

Hexadecimal: 166bf

Square: 8434401921

Square Root: 303.04950090703005

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) = [xⁿ] f(x)ⁿ, where f(x) = (1 - x⁷)⁷/((1 - x²)² * (1 - x⁵)⁵). A372212

Numbers n such that 9·10ⁿ + 8·R_n - 5 is prime, where R_n = 11...1 is the repunit (A002275) of length n. A103108

Indices of octagonal pyramidal numbers that are both octagonal and octagonal pyramidal. A378918

A smoothed version of A091579. A91839