Properties of the Number 79861

Seventy-Nine Thousand Eight Hundred Sixty-One

Basics

Value: 79860 → 79861 → 79862

Parity: odd

Prime: Yes

Previous Prime: 79847

Next Prime: 79867

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 79861

Divisors: 1, 79861

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011011111110101

Octal: 233765

Duodecimal: 3A271

Hexadecimal: 137f5

Square: 6377779321

Square Root: 282.59688604087626

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 p of Erdos-Selfridge class 5+ with largest prime factor of p+1 not of class 4+. A129473

Number of permutations of length n with longest increasing subsequence of length 8. A239432

Centered 11-gonal (or hendecagonal) primes. A262344

Primes in A284798. A372770

a(n) is the number of occurrences of 7's in the palindromic compositions of 2·n-1, or also, the number of occurrences of 8's in the palindromic compositions of 2·n. A79861

Least k > 0 such that 2n - p is prime where p is some prime divisor of 4n² - (2k-1)² for n >= 4. A306261