Properties of the Number 90090

Ninety Thousand Ninety

Basics

Value: 90089 → 90090 → 90091

Parity: even

Prime: No

Previous Prime: 90089

Next Prime: 90107

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ² × 5 × 7 × 11 × 13

Divisors: 1, 2, 3, 5, 6, 7, 9, 10, 11, 13

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10101111111101010

Octal: 257752

Duodecimal: 44176

Hexadecimal: 15fea

Square: 8116208100

Square Root: 300.1499625187383

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

T(n,k) = binomial(n,k)*binomial(n+k,k), 0 <= k <= n, triangle read by rows. A63007

a(1)=1, a(2)=2; thereafter, a(n) is the smallest number m not yet in the sequence such that every prime that divides a(n-1) also divides m. A60735

Triangle of coefficients of Legendre polynomials P_n (x). A8316

Smallest number beginning with 9 and having exactly n distinct prime divisors. A77334

Triangle of coefficients of normalized Legendre polynomials, with increasing exponents. A100258

Number of partitions of n having (sum of odd parts) = (sum of even parts). A239261

Coefficient triangle of certain polynomials N(4; m,x). A62264

Odd bisection of A260443 (the even terms): a(n) = A260443((2·n)+1). A277324

Smallest multiple of n using only digits 0 and 9. A78248

T(n,k) = binomial(n,2·k)*binomial(2·k,k) for 0 <= k <= n, triangle read by rows. A89627