Properties of the Number 91813

Ninety-One Thousand Eight Hundred Thirteen

Basics

Value: 91812 → 91813 → 91814

Parity: odd

Prime: Yes

Previous Prime: 91811

Next Prime: 91823

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 91813

Divisors: 1, 91813

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10110011010100101

Octal: 263245

Duodecimal: 45171

Hexadecimal: 166a5

Square: 8429626969

Square Root: 303.00660058817203

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

Greater of twin primes of the form x²+2, x²+4. A85554

Smallest prime p == 5 (mod 8) such that Q(sqrt(p)) has class number 2n+1. A355877

Primes p of the form x²+4, such that either p-2 or p+2 is prime. A85555

Primes of the form 9n² + 4. A201706

Number of positive squarefree integers k<=n satisfying gcd_*(k,n)=1, where gcd_*(k,n) is the greatest divisor of k that is also a unitary divisor of n. A91813