Properties of the Number 64805

Sixty-Four Thousand Eight Hundred Five

Basics

Value: 64804 → 64805 → 64806

Parity: odd

Prime: No

Previous Prime: 64793

Next Prime: 64811

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 5 × 13 × 997

Divisors: 1, 5, 13, 65, 997, 4985, 12961, 64805

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111110100100101

Octal: 176445

Duodecimal: 31605

Hexadecimal: fd25

Square: 4199688025

Square Root: 254.568261965234

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

Triangle P, read by rows, where column k of P² equals column 0 of P^2k+2 such that column 0 of P² equals column 0 of P shift one place left, with P(0,0)=1. A135880

Triangle, read by rows equal to the matrix product P^-1·R, where P = A135880 and R = A135894; P^-1·R equals triangle P shifted right one column. A135898

A Chebyshev-related transform of the Jacobsthal numbers. A112577

Numbers n not of the form i²+(i+1)² such that there are integers a < b with a²+(a+1)²+...+(n-1)² = n²+(n+1)²+...+b². A94523

Numbers k such that φ(k) > φ(k+2). A64805