Properties of the Number 81973

Eighty-One Thousand Nine Hundred Seventy-Three

Basics

Value: 81972 → 81973 → 81974

Parity: odd

Prime: Yes

Previous Prime: 81971

Next Prime: 82003

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 81973

Divisors: 1, 81973

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10100000000110101

Octal: 240065

Duodecimal: 3B531

Hexadecimal: 14035

Square: 6719572729

Square Root: 286.3092733391638

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

Primes of the form floor( (k*(sqrt(3)*k-1))/sqrt(2) ). A180449

Primes p=prime(i) of level (1,4), i.e., such that A118534(i) = prime(i-4). A216177

Primes p such that 2·p + 79 is a square. A269790

a(1) = 1; a(n) = a(n-1) + σ(a(n-1)) where σ(k) = sum of the divisors of k. A81973