Properties of the Number 83643

Eighty-Three Thousand Six Hundred Forty-Three

Basics

Value: 83642 → 83643 → 83644

Parity: odd

Prime: No

Previous Prime: 83641

Next Prime: 83653

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 3 × 7 ² × 569

Divisors: 1, 3, 7, 21, 49, 147, 569, 1707, 3983, 11949

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10100011010111011

Octal: 243273

Duodecimal: 404A3

Hexadecimal: 146bb

Square: 6996151449

Square Root: 289.2109956415904

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

a(n) = 21·a(n-2) + 7·a(n-3), with a(0)=0, a(1)=3, and a(2)=6. A215492

Number of rooted identity trees with n nodes and 4 leaves. A55329

Starting positions of strings of four 9's in the decimal expansion of π. A83643

Square array, read by antidiagonals, where row n+1 equals the partial sums of the previous row after removing the terms in positions {n, n+1} from row n for n>=0, with row 0 equal to all 1's. A137570