Properties of the Number 79999

Seventy-Nine Thousand Nine Hundred Ninety-Nine

Basics

Value: 79998 → 79999 → 80000

Parity: odd

Prime: Yes

Previous Prime: 79997

Next Prime: 80021

Digit Sum: 43

Digital Root: 7

Palindrome: No

Factorization: 79999

Divisors: 1, 79999

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10011100001111111

Octal: 234177

Duodecimal: 3A367

Hexadecimal: 1387f

Square: 6399840001

Square Root: 282.8409447021417

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

Smallest number whose sum of digits is n. A51885

Primes that contain digits 7 and 9 only. A20471

Smallest prime with digit sum n, or 0 if no such prime exists. A67180

Primes that contain only the digits (0, 7, 9). A261181

Smallest prime number whose digits sum to n-th prime. A54750

Near-repdigit primes with 9 as repeated digit. A105975

Primes having only {7, 8, 9} as digits. A106110

Primes of the form 2^r*5^s - 1. A77313

If k is a number with exactly two distinct decimal digits, say a and b, neither of which is 0 (i.e., a member of A101594), define the self-complement of k, SC(k), to be the number obtained by replacing a with b and vice versa. E.g. SC(232233) = 323322. Sequence contains primes p such that SC(p) is also a prime. A83983

Primes at which sum of digits strictly increases. A61248