79139693 has 8 divisors (see below), whose sum is σ = 83399520. Its totient is φ = 74889360.

The previous prime is 79139677. The next prime is 79139699. The reversal of 79139693 is 39693197.

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 79139693 - 2⁴ = 79139677 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 (79139699) 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, 20471 + ... + 24027.

It is an arithmetic number, because the mean of its divisors is an integer number (10424940).

Almost surely, 2^79139693 is an apocalyptic number.

It is an amenable number.

79139693 is a deficient number, since it is larger than the sum of its proper divisors (4259827).

79139693 is a wasteful number, since it uses less digits than its factorization.

79139693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4747.

The product of its digits is 275562, while the sum is 47.

The square root of 79139693 is about 8896.0492916800. The cubic root of 79139693 is about 429.3368053265.

The spelling of 79139693 in words is "seventy-nine million, one hundred thirty-nine thousand, six hundred ninety-three".