188117147 has 2 divisors, whose sum is σ = 188117148. Its totient is φ = 188117146.

The previous prime is 188117141. The next prime is 188117177. The reversal of 188117147 is 741711881.

It is a weak prime.

It is an emirp because it is prime and its reverse (741711881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 188117147 - 2²⁰ = 187068571 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 188117147.

It is not a weakly prime, because it can be changed into another prime (188117141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94058573 + 94058574.

It is an arithmetic number, because the mean of its divisors is an integer number (94058574).

Almost surely, 2^188117147 is an apocalyptic number.

188117147 is a deficient number, since it is larger than the sum of its proper divisors (1).

188117147 is an equidigital number, since it uses as much as digits as its factorization.

188117147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12544, while the sum is 38.

The square root of 188117147 is about 13715.5804470682. The cubic root of 188117147 is about 572.9843953082.

The spelling of 188117147 in words is "one hundred eighty-eight million, one hundred seventeen thousand, one hundred forty-seven".