79500643 has 4 divisors (see below), whose sum is σ = 79781848. Its totient is φ = 79219440.

The previous prime is 79500613. The next prime is 79500649. The reversal of 79500643 is 34600597.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 79500643 - 2²⁵ = 45946211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79500599 and 79500608.

It is not an unprimeable number, because it can be changed into a prime (79500649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140178 + ... + 140743.

It is an arithmetic number, because the mean of its divisors is an integer number (19945462).

Almost surely, 2^79500643 is an apocalyptic number.

79500643 is a deficient number, since it is larger than the sum of its proper divisors (281205).

79500643 is a wasteful number, since it uses less digits than its factorization.

79500643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281204.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 79500643 is about 8916.3133076401. The cubic root of 79500643 is about 429.9885394458.

The spelling of 79500643 in words is "seventy-nine million, five hundred thousand, six hundred forty-three".