Properties of the Number 90066

Ninety Thousand Sixty-Six

Basics

Value: 90065 → 90066 → 90067

Parity: even

Prime: No

Previous Prime: 90059

Next Prime: 90067

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 17 × 883

Divisors: 1, 2, 3, 6, 17, 34, 51, 102, 883, 1766

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10101111111010010

Octal: 257722

Duodecimal: 44156

Hexadecimal: 15fd2

Square: 8111884356

Square Root: 300.1099798407244

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

Expansion of x⁴*(2+x)/((1+x)*(1-x)⁵). A82289

Double factorial of odd numbers: a(n) = (2·n-1)!! = 1·3*5*...*(2·n-1). A1147

Euler or up/down numbers: e.g.f. sec(x) + tan(x). Also for n >= 2, half the number of alternating permutations on n letters (A001250). A111

Wedderburn-Etherington numbers: unlabeled binary rooted trees (every node has outdegree 0 or 2) with n endpoints (and 2n-1 nodes in all). A1190

Schroeder's fourth problem; also series-reduced rooted trees with n labeled leaves; also number of total partitions of n. A311

a(n) = n!*(n-1)!/2^n-1. A6472

Number of ultradissimilarity relations on an n-set. A5121

Number of irreducible representations of the symmetric group S_n that have odd degree. A59867

Number of regular sequences of length n. A3513

Number of Van Lier sequences of length n. A5272