79393157 has 8 divisors (see below), whose sum is σ = 81681912. Its totient is φ = 77112000.

The previous prime is 79393151. The next prime is 79393159. The reversal of 79393157 is 75139397.

It can be written as a sum of positive squares in 4 ways, for example, as 63504961 + 15888196 = 7969^2 + 3986^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79393157 - 2⁴ = 79393141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79393151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24407 + ... + 27467.

It is an arithmetic number, because the mean of its divisors is an integer number (10210239).

Almost surely, 2^79393157 is an apocalyptic number.

It is an amenable number.

79393157 is a deficient number, since it is larger than the sum of its proper divisors (2288755).

79393157 is a wasteful number, since it uses less digits than its factorization.

79393157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3799.

The product of its digits is 178605, while the sum is 44.

The square root of 79393157 is about 8910.2837777480. The cubic root of 79393157 is about 429.7946685072.

The spelling of 79393157 in words is "seventy-nine million, three hundred ninety-three thousand, one hundred fifty-seven".