79138012 has 6 divisors (see below), whose sum is σ = 138491528. Its totient is φ = 39569004.

The previous prime is 79138001. The next prime is 79138019. The reversal of 79138012 is 21083197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79138019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9892248 + ... + 9892255.

Almost surely, 2^79138012 is an apocalyptic number.

It is an amenable number.

79138012 is a deficient number, since it is larger than the sum of its proper divisors (59353516).

79138012 is a wasteful number, since it uses less digits than its factorization.

79138012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19784507 (or 19784505 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 79138012 is about 8895.9548110363. The cubic root of 79138012 is about 429.3337654686. Note that the first 3 decimals are identical.

The spelling of 79138012 in words is "seventy-nine million, one hundred thirty-eight thousand, twelve".