Properties of the Number 90945

Ninety Thousand Nine Hundred Forty-Five

Basics

Value: 90944 → 90945 → 90946

Parity: odd

Prime: No

Previous Prime: 90931

Next Prime: 90947

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 5 × 43 × 47

Divisors: 1, 3, 5, 9, 15, 43, 45, 47, 129, 141

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10110001101000001

Octal: 261501

Duodecimal: 44769

Hexadecimal: 16341

Square: 8270993025

Square Root: 301.5708871890654

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

Sum of first k numbers in column k of the natural number array A000027; by antidiagonals. A185787

a(n) = (2·n+1)*(2·n+3)*(2·n+5). A61550

a(0) = 0, a(1) = 1. For n >= 2, a(n) = a(n-1)/(n-1) if n-1 divides a(n-1); otherwise, a(n) = a(n-1) + a(n-2). A343376

Number of odd length roads between any adjacent nodes in virtual optimal chordal ring of degree 3 (the length of chord < number of nodes/2). A87457

Odd numbers k that can be factored to such a pair of coprime factors·and y that A347381(k) < min(A347381(x), A347381(y)). A347390

a(n) = (4·n+3)*(4·n+5)*(4·n+7). A133767

a(n) = (6·n+1)*(6·n+3)*(6·n+5). A1520

Harmonic numbers (A001599) which are not perfect (A000396). A90945