Properties of the Number 64447

Sixty-Four Thousand Four Hundred Forty-Seven

Basics

Value: 64446 → 64447 → 64448

Parity: odd

Prime: No

Previous Prime: 64439

Next Prime: 64451

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 17 ² × 223

Divisors: 1, 17, 223, 289, 3791, 64447

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111101110111111

Octal: 175677

Duodecimal: 31367

Hexadecimal: fbbf

Square: 4153415809

Square Root: 253.86413689215735

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

G.f.: ∑_n>=0 (2ⁿ + 1)ⁿ * xⁿ / (1 + (2ⁿ - 1)*x)ⁿ⁺¹. A337528

a(n) = φ(nⁿ). A64447

Indices of primes in sequence defined by A(0) = 67, A(n) = 10·A(n-1) - 23 for n > 0. A101529

Numbers n such that 6·10ⁿ + 4·R_n + 3 is prime, where R_n = 11...1 is the repunit (A002275) of length n. A103036