188112813 has 12 divisors (see below), whose sum is σ = 291767040. Its totient is φ = 107492952.

The previous prime is 188112809. The next prime is 188112833. The reversal of 188112813 is 318211881.

It is not a de Polignac number, because 188112813 - 2² = 188112809 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188112833) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 639693 + ... + 639986.

It is an arithmetic number, because the mean of its divisors is an integer number (24313920).

Almost surely, 2^188112813 is an apocalyptic number.

It is an amenable number.

188112813 is a deficient number, since it is larger than the sum of its proper divisors (103654227).

188112813 is a wasteful number, since it uses less digits than its factorization.

188112813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279696 (or 1279689 counting only the distinct ones).

The product of its digits is 3072, while the sum is 33.

The square root of 188112813 is about 13715.4224506575. The cubic root of 188112813 is about 572.9799949766.

The spelling of 188112813 in words is "one hundred eighty-eight million, one hundred twelve thousand, eight hundred thirteen".