Properties of the Number 91217

Ninety-One Thousand Two Hundred Seventeen

Basics

Value: 91216 → 91217 → 91218

Parity: odd

Prime: No

Previous Prime: 91199

Next Prime: 91229

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 7 × 83 × 157

Divisors: 1, 7, 83, 157, 581, 1099, 13031, 91217

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10110010001010001

Octal: 262121

Duodecimal: 44955

Hexadecimal: 16451

Square: 8320541089

Square Root: 302.021522411897

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

a(1)=1, a(n)=a(n-a(1))+a(n-a(2))+a(n-a(3))+....a(n-a(n-1)) for n>1, with convention that a(i)=0 for i<=0. A52109

Numbers k such that (prime(j)-1)² + 1 is prime for k <= j <= k + 2. A376522

Number of permutations p of [n] such that the n-1 sums p(i)+p(i+1) (i=1,2,...n-1) are all distinct. A91217