Properties of the Number 83981

Eighty-Three Thousand Nine Hundred Eighty-One

Basics

Value: 83980 → 83981 → 83982

Parity: odd

Prime: No

Previous Prime: 83969

Next Prime: 83983

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 137 × 613

Divisors: 1, 137, 613, 83981

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10100100000001101

Octal: 244015

Duodecimal: 40725

Hexadecimal: 1480d

Square: 7052808361

Square Root: 289.79475495598604

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

Expansion of (2 + x + x² + x³ - x⁴ - 2·x⁵ - 4·x⁶ - 8·x⁷) / (1 - x⁴ + 16·x⁸) in powers of x. A247487

a(n) = (9·6ⁿ+1)/5. A199412

Strong pseudoprimes to base 69. A20295

Strong pseudoprimes to base 93. A20319

Number of 2 X 2 matrices with all elements in {0,1,...,n} and determinant in {0,1,...,n}. A209995

11-gonal numbers which are products of two distinct primes. A354448

Smallest palindromic prime containing exactly n zeros. A83981

a(n) is the number of iterations of x -> 6·x - 1 until (# composites reached) = (# primes reached), starting with prime(n). A377621