Properties of the Number 89645

Eighty-Nine Thousand Six Hundred Forty-Five

Basics

Value: 89644 → 89645 → 89646

Parity: odd

Prime: No

Previous Prime: 89633

Next Prime: 89653

Digit Sum: 32

Digital Root: 5

Palindrome: No

Factorization: 5 × 17929

Divisors: 1, 5, 17929, 89645

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10101111000101101

Octal: 257055

Duodecimal: 43A65

Hexadecimal: 15e2d

Square: 8036226025

Square Root: 299.4077487307234

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

a(n) = ∑_{k=0..floor(n/2)} T(n,k) * T(n,k+1), with T given by A026009. A27288

Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 20. A31608

Penny Flipping, or Flipping Coins: Given a stack of n coins, flip the top coin, then the stack of the top two coins, then the stack of the top three etc... starting again with the top coin after flipping all n coins. A flip of m coins reverses their order and inverts their state. This is the number of flips required to restore the stack to its original configuration. A89645