Properties of the Number 64643

Sixty-Four Thousand Six Hundred Forty-Three

Basics

Value: 64642 → 64643 → 64644

Parity: odd

Prime: No

Previous Prime: 64633

Next Prime: 64661

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 127 × 509

Divisors: 1, 127, 509, 64643

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111110010000011

Octal: 176203

Duodecimal: 314AB

Hexadecimal: fc83

Square: 4178717449

Square Root: 254.24987708944914

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

Numbers n such that A229964(n) = 3. A229966

Number of 6-cycles in the n-triangular honeycomb obtuse knight graph. A290392

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 577", based on the 5-celled von Neumann neighborhood. A273024

Bidirectional 'Delannoy' variation of the Boustrophedon transform applied to all 1's sequence: Fill an triangular array in alternating directions. Let the first element of each row in that direction be equal to 1. Each next entry is given by T(n,k) = T(n,k +/- 1) + T(n-1,k-1) + T(n-1,k) + T(n-2,k-1), where the +/- depends on which is the previous element in the direction one is filling in the row. The final number of row n gives a(n). A64643