79138013 has 8 divisors (see below), whose sum is σ = 82905600. Its totient is φ = 75439728.

The previous prime is 79138001. The next prime is 79138019. The reversal of 79138013 is 31083197.

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 79138013 - 2⁸ = 79137757 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 (79138019) 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, 14981 + ... + 19562.

It is an arithmetic number, because the mean of its divisors is an integer number (10363200).

Almost surely, 2^79138013 is an apocalyptic number.

It is an amenable number.

79138013 is a deficient number, since it is larger than the sum of its proper divisors (3767587).

79138013 is a wasteful number, since it uses less digits than its factorization.

79138013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34651.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 79138013 is about 8895.9548672416. The cubic root of 79138013 is about 429.3337672770. Note that the first 3 decimals are identical.

The spelling of 79138013 in words is "seventy-nine million, one hundred thirty-eight thousand, thirteen".