79173813 has 8 divisors (see below), whose sum is σ = 105606400. Its totient is φ = 52761888.

The previous prime is 79173763. The next prime is 79173823. The reversal of 79173813 is 31837197.

It is a happy number.

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

It is not a de Polignac number, because 79173813 - 2⁸ = 79173557 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 (79173823) 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, 11073 + ... + 16761.

It is an arithmetic number, because the mean of its divisors is an integer number (13200800).

Almost surely, 2^79173813 is an apocalyptic number.

It is an amenable number.

79173813 is a deficient number, since it is larger than the sum of its proper divisors (26432587).

79173813 is a wasteful number, since it uses less digits than its factorization.

79173813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10331.

The product of its digits is 31752, while the sum is 39.

The square root of 79173813 is about 8897.9667902280. The cubic root of 79173813 is about 429.3984973655.

The spelling of 79173813 in words is "seventy-nine million, one hundred seventy-three thousand, eight hundred thirteen".