79138929 has 24 divisors (see below), whose sum is σ = 112758912. Its totient is φ = 49345120.

The previous prime is 79138901. The next prime is 79138937. The reversal of 79138929 is 92983197.

It is not a de Polignac number, because 79138929 - 2¹² = 79134833 is a prime.

It is a super-3 number, since 3×79138929³ (a number of 25 digits) contains 333 as substring.

Its product of digits (244944) is a multiple of the sum of its prime divisors (1134).

It is not an unprimeable number, because it can be changed into a prime (79138229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74059 + ... + 75119.

It is an arithmetic number, because the mean of its divisors is an integer number (4698288).

Almost surely, 2^79138929 is an apocalyptic number.

It is an amenable number.

79138929 is a deficient number, since it is larger than the sum of its proper divisors (33619983).

79138929 is a wasteful number, since it uses less digits than its factorization.

79138929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157 (or 1134 counting only the distinct ones).

The product of its digits is 244944, while the sum is 48.

The square root of 79138929 is about 8896.0063511668. The cubic root of 79138929 is about 429.3354237427.

The spelling of 79138929 in words is "seventy-nine million, one hundred thirty-eight thousand, nine hundred twenty-nine".