Properties of the Number 87945

Eighty-Seven Thousand Nine Hundred Forty-Five

Basics

Value: 87944 → 87945 → 87946

Parity: odd

Prime: No

Previous Prime: 87943

Next Prime: 87959

Digit Sum: 33

Digital Root: 6

Palindrome: No

Factorization: 3 × 5 × 11 × 13 × 41

Divisors: 1, 3, 5, 11, 13, 15, 33, 39, 41, 55

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10101011110001001

Octal: 253611

Duodecimal: 42A89

Hexadecimal: 15789

Square: 7734323025

Square Root: 296.5552225134469

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

Number of nonempty subsets of {1..n} whose elements have an odd root mean square. A357415

G.f. A(x) satisfies A(x) = 1 + x³*(1+x)*A(x)². A366588

Suspected divisor-or-multiple permutation of squarefree numbers: a(n) = A019565(A304533(n)). A304537

Numerators of continued fraction convergents to sqrt(878). A42696

Fibonacci sequence beginning 0, 13. A22347

Products of 5 distinct primes a,b,c,d,e, such that a+b+c+d+e are prime numbers. A178782

Numerators of coefficients in Taylor series expansion of sqrt(m(x)) where m(x) is g.f. for Motzkin numbers A001006. A261421

G.f. A(x) satisfies A(x) = 1/A(-x·A(x)) such that [x^2·n+1] A(x)ⁿ = 0 for n >= 0, with A(0) = A'(0) = 1. A377251

Expansion of (1-2x-x²)/((1-2x)(1-4x+x²)). A87945