Properties of the Number 64809

Sixty-Four Thousand Eight Hundred Nine

Basics

Value: 64808 → 64809 → 64810

Parity: odd

Prime: No

Previous Prime: 64793

Next Prime: 64811

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 19 × 379

Divisors: 1, 3, 9, 19, 57, 171, 379, 1137, 3411, 7201

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111110100101001

Octal: 176451

Duodecimal: 31609

Hexadecimal: fd29

Square: 4200206481

Square Root: 254.5761182829214

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

Number of (w,x,y,z) with all terms in {1,...,n} and w<x·y*z. A212057

a(n)=a(n-1)+a(n-2)-d, where d=a(n/2) if n is even, else d=0; 2 initial terms. A50192

Decimal expansion of π written as a sequence of positive integers avoiding duplicates. A64809