79397813 has 8 divisors (see below), whose sum is σ = 86710176. Its totient is φ = 72101200.

The previous prime is 79397807. The next prime is 79397839. The reversal of 79397813 is 31879397.

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 79397813 - 2⁴ = 79397797 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 (79391813) 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, 8270 + ... + 15072.

It is an arithmetic number, because the mean of its divisors is an integer number (10838772).

Almost surely, 2^79397813 is an apocalyptic number.

It is an amenable number.

79397813 is a deficient number, since it is larger than the sum of its proper divisors (7312363).

79397813 is a wasteful number, since it uses less digits than its factorization.

79397813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7875.

The product of its digits is 285768, while the sum is 47.

The square root of 79397813 is about 8910.5450450576. The cubic root of 79397813 is about 429.8030700913.

The spelling of 79397813 in words is "seventy-nine million, three hundred ninety-seven thousand, eight hundred thirteen".