Properties of the Number 64389

Sixty-Four Thousand Three Hundred Eighty-Nine

Basics

Value: 64388 → 64389 → 64390

Parity: odd

Prime: No

Previous Prime: 64381

Next Prime: 64399

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 3 × 13 ² × 127

Divisors: 1, 3, 13, 39, 127, 169, 381, 507, 1651, 4953

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111101110000101

Octal: 175605

Duodecimal: 31319

Hexadecimal: fb85

Square: 4145943321

Square Root: 253.74987684726077

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

Expansion of ∏_k>=1 (1 - x^k)¹³. A10820

Number of (w,x,y,z) with all terms in {1,...,n} and w+x>=2y+2z. A212565

Variation (4) on Recamán's sequence (A005132): to get a(n), we first try to subtract n from a(n-1): a(n) = a(n-1) - n if positive and not already in the sequence; if not then we try to add n: a(n) = a(n-1) + n if not already in the sequence; if this fails we try to subtract n+1 from a(n-1), or to add n+1 to a(n-1), or to subtract n+2, or to add n+2, etc., until one of these produces a positive number not already in the sequence - this is a(n). A64389