Properties of the Number 90999

Ninety Thousand Nine Hundred Ninety-Nine

Basics

Value: 90998 → 90999 → 91000

Parity: odd

Prime: No

Previous Prime: 90997

Next Prime: 91009

Digit Sum: 36

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 10111

Divisors: 1, 3, 9, 10111, 30333, 90999

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10110001101110111

Octal: 261567

Duodecimal: 447B3

Hexadecimal: 16377

Square: 8280818001

Square Root: 301.66040509155323

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

Numbers whose set of base 10 digits is {0,9}. A97256

Numbers having four 9's in base 10. A43528

Given g.f. A(x) of this sequence, triangle A236961 transforms the diagonals in the table of successive iterations of A(x) such that A236961(n,0) = nⁿ. A236960

Triangle, read by rows, that transforms diagonals in the table of coefficients in the successive iterations of g.f. of A236960 such that column 0 equals T(n,0) = nⁿ. A236961

G.f. satisfies: A(x) = ∑_n>=0 xⁿ * (2·A(x)^2·n - A(x)ⁿ). A244062

Numbers k such that σ(k)-k = π(σ(k)). A90999