Properties of the Number 81904

Eighty-One Thousand Nine Hundred Four

Basics

Value: 81903 → 81904 → 81905

Parity: even

Prime: No

Previous Prime: 81901

Next Prime: 81919

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 ⁴ × 5119

Divisors: 1, 2, 4, 8, 16, 5119, 10238, 20476, 40952, 81904

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011111111110000

Octal: 237760

Duodecimal: 3B494

Hexadecimal: 13ff0

Square: 6708265216

Square Root: 286.18874890533345

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

Starts of runs of 4 consecutive positive negabinary-Niven numbers (A331728). A331824

A007318 * [1, 2, 2, 3, 2, 3, 2, 3, 2, ...]. A133124

Matrix inverse of the Narayana triangle A001263. A103364

Second binomial transform of binomial(n+6, 6). A81904