Properties of the Number 82643

Eighty-Two Thousand Six Hundred Forty-Three

Basics

Value: 82642 → 82643 → 82644

Parity: odd

Prime: No

Previous Prime: 82633

Next Prime: 82651

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 11 ² × 683

Divisors: 1, 11, 121, 683, 7513, 82643

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10100001011010011

Octal: 241323

Duodecimal: 3B9AB

Hexadecimal: 142d3

Square: 6829865449

Square Root: 287.47695559818357

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 k such that σ(φ(σ(k))) = φ(k). A66465

Begin with a(0) = 3. Let a(n) for n > 0 be the smallest positive integer not yet in the sequence which forms part of a Primitive Pythagorean Triple (PPT) when paired with a(n-1). A239356

a(n) = ceiling(n*(n+1/2)/2). A82643