78931113 has 4 divisors (see below), whose sum is σ = 105241488. Its totient is φ = 52620740.

The previous prime is 78931093. The next prime is 78931121. The reversal of 78931113 is 31113987.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78931113 - 2⁵ = 78931081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78931183) 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, 13155183 + ... + 13155188.

It is an arithmetic number, because the mean of its divisors is an integer number (26310372).

Almost surely, 2^78931113 is an apocalyptic number.

It is an amenable number.

78931113 is a deficient number, since it is larger than the sum of its proper divisors (26310375).

78931113 is a wasteful number, since it uses less digits than its factorization.

78931113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26310374.

The product of its digits is 4536, while the sum is 33.

The square root of 78931113 is about 8884.3183756549. The cubic root of 78931113 is about 428.9592878161.

The spelling of 78931113 in words is "seventy-eight million, nine hundred thirty-one thousand, one hundred thirteen".