79311397 has 8 divisors (see below), whose sum is σ = 87564960. Its totient is φ = 71231760.

The previous prime is 79311367. The next prime is 79311431.

It is a happy number.

79311397 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79311397 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 (79311347) 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, 42522 + ... + 44347.

It is an arithmetic number, because the mean of its divisors is an integer number (10945620).

Almost surely, 2^79311397 is an apocalyptic number.

It is an amenable number.

79311397 is a deficient number, since it is larger than the sum of its proper divisors (8253563).

79311397 is a wasteful number, since it uses less digits than its factorization.

79311397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86963.

The product of its digits is 35721, while the sum is 40.

The square root of 79311397 is about 8905.6946388252. The cubic root of 79311397 is about 429.6470819776.

The spelling of 79311397 in words is "seventy-nine million, three hundred eleven thousand, three hundred ninety-seven".