Properties of the Number 91890

Ninety-One Thousand Eight Hundred Ninety

Basics

Value: 91889 → 91890 → 91891

Parity: even

Prime: No

Previous Prime: 91873

Next Prime: 91909

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ² × 5 × 1021

Divisors: 1, 2, 3, 5, 6, 9, 10, 15, 18, 30

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10110011011110010

Octal: 263362

Duodecimal: 45216

Hexadecimal: 166f2

Square: 8443772100

Square Root: 303.1336338976591

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

Analog of A060410 for the 7x+1 problem (cf. A133421). A133426

Number of partitions of n into sums of exactly three distinct powers of 2. A91890

E.g.f. satisfies: A(x) = 1/(1 - 2·x*exp(x·A(x))). A201470