79523147 has 4 divisors (see below), whose sum is σ = 86752536. Its totient is φ = 72293760.

The previous prime is 79523137. The next prime is 79523159. The reversal of 79523147 is 74132597.

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

It is not a de Polignac number, because 79523147 - 2²² = 75328843 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79523147.

It is not an unprimeable number, because it can be changed into a prime (79523137) 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, 3614678 + ... + 3614699.

It is an arithmetic number, because the mean of its divisors is an integer number (21688134).

Almost surely, 2^79523147 is an apocalyptic number.

79523147 is a deficient number, since it is larger than the sum of its proper divisors (7229389).

79523147 is a wasteful number, since it uses less digits than its factorization.

79523147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7229388.

The product of its digits is 52920, while the sum is 38.

The square root of 79523147 is about 8917.5751749004. The cubic root of 79523147 is about 430.0291074581.

The spelling of 79523147 in words is "seventy-nine million, five hundred twenty-three thousand, one hundred forty-seven".