Properties of the Number 81993

Eighty-One Thousand Nine Hundred Ninety-Three

Basics

Value: 81992 → 81993 → 81994

Parity: odd

Prime: No

Previous Prime: 81973

Next Prime: 82003

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 3 × 151 × 181

Divisors: 1, 3, 151, 181, 453, 543, 27331, 81993

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10100000001001001

Octal: 240111

Duodecimal: 3B549

Hexadecimal: 14049

Square: 6722852049

Square Root: 286.3441984744933

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

Indices k of highly composite numbers with records of low values of the ratio between consecutive terms, A002182(k+1)/A002182(k). A309745

a(n) = sum of numbers formed using the digits of next n numbers. A81993