Properties of the Number 81943

Eighty-One Thousand Nine Hundred Forty-Three

Basics

Value: 81942 → 81943 → 81944

Parity: odd

Prime: Yes

Previous Prime: 81937

Next Prime: 81953

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 81943

Divisors: 1, 81943

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10100000000010111

Octal: 240027

Duodecimal: 3B507

Hexadecimal: 14017

Square: 6714655249

Square Root: 286.256877646634

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

Smallest prime p such that M(n)² - p·M(n) + 1 is prime with M(n) = A000668(n). A139429

Smallest prime p such that (n+1)^p - n^p is prime. A58013

a(1) = 1, a(n)= smallest number not occurring earlier such that a(n-1)*a(n) -1 is a prime. re-arrangement of natural numbers such that the product of adjacent terms is one more than a prime. A81943