Properties of the Number 79991

Seventy-Nine Thousand Nine Hundred Ninety-One

Basics

Value: 79990 → 79991 → 79992

Parity: odd

Prime: No

Previous Prime: 79987

Next Prime: 79997

Digit Sum: 35

Digital Root: 8

Palindrome: No

Factorization: 41 × 1951

Divisors: 1, 41, 1951, 79991

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011100001110111

Octal: 234167

Duodecimal: 3A35B

Hexadecimal: 13877

Square: 6398560081

Square Root: 282.82680212455114

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

Number of partitions of n whose greatest part is a multiple of 3. A363045

Expansion of ∏_k>=1 1/(1 - x^k)^sigma₁(k-k), where sigma₁(k) = sum of divisors of k (A000203). A318784

Number of permutations satisfying -k<=p(i)-i<=r and p(i)-i not in I, i=1..n, with k=3, r=3, I={-1,1}. A79991

Indices of primes in sequence defined by A(0) = 71, A(n) = 10·A(n-1) + 81 for n > 0. A101154

Numbers k such that 8·10^k - 9 is prime. A103068