79389331 has 4 divisors (see below), whose sum is σ = 90730672. Its totient is φ = 68047992.

The previous prime is 79389319. The next prime is 79389361. The reversal of 79389331 is 13398397.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 79389331 - 2¹⁷ = 79258259 is a prime.

It is a super-2 number, since 2×79389331² = 12605331753255122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79389301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5670660 + ... + 5670673.

It is an arithmetic number, because the mean of its divisors is an integer number (22682668).

Almost surely, 2^79389331 is an apocalyptic number.

79389331 is a deficient number, since it is larger than the sum of its proper divisors (11341341).

79389331 is a wasteful number, since it uses less digits than its factorization.

79389331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11341340.

The product of its digits is 122472, while the sum is 43.

The square root of 79389331 is about 8910.0690794180. The cubic root of 79389331 is about 429.7877643823.

The spelling of 79389331 in words is "seventy-nine million, three hundred eighty-nine thousand, three hundred thirty-one".