188117793 has 12 divisors (see below), whose sum is σ = 272108928. Its totient is φ = 125235000.

The previous prime is 188117791. The next prime is 188117807. The reversal of 188117793 is 397711881.

It is a happy number.

188117793 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 188117793 - 2¹ = 188117791 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (188117791) 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, 7833 + ... + 20918.

It is an arithmetic number, because the mean of its divisors is an integer number (22675744).

Almost surely, 2^188117793 is an apocalyptic number.

It is an amenable number.

188117793 is a deficient number, since it is larger than the sum of its proper divisors (83991135).

188117793 is a wasteful number, since it uses less digits than its factorization.

188117793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29484 (or 29481 counting only the distinct ones).

The product of its digits is 84672, while the sum is 45.

The square root of 188117793 is about 13715.6039969080. The cubic root of 188117793 is about 572.9850511894.

The spelling of 188117793 in words is "one hundred eighty-eight million, one hundred seventeen thousand, seven hundred ninety-three".