Properties of the Number 87989

Eighty-Seven Thousand Nine Hundred Eighty-Nine

Basics

Value: 87988 → 87989 → 87990

Parity: odd

Prime: No

Previous Prime: 87977

Next Prime: 87991

Digit Sum: 41

Digital Root: 5

Palindrome: No

Factorization: 11 × 19 × 421

Divisors: 1, 11, 19, 209, 421, 4631, 7999, 87989

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10101011110110101

Octal: 253665

Duodecimal: 42B05

Hexadecimal: 157b5

Square: 7742064121

Square Root: 296.62939840818206

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 m such that abs(K(m+1) - K(m)) = 2, and both m and m+1 are squarefree (A005117), where K(m) = A002034(m) is the Kempner function. A346212

Number of vertices with distinct coordinates up to permutation in the Loday realization of the (n-1)-dimensional associahedron. A392457

Smallest prime that is the sum of a square and a positive cube in n different ways. A173795

a(n) = M(n!), the value of Mertens's function at the n-th factorial. A87989