188222939 has 2 divisors, whose sum is σ = 188222940. Its totient is φ = 188222938.

The previous prime is 188222933. The next prime is 188222953. The reversal of 188222939 is 939222881.

It is a weak prime.

It is an emirp because it is prime and its reverse (939222881) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-188222939 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 188222939.

It is not a weakly prime, because it can be changed into another prime (188222933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94111469 + 94111470.

It is an arithmetic number, because the mean of its divisors is an integer number (94111470).

Almost surely, 2^188222939 is an apocalyptic number.

188222939 is a deficient number, since it is larger than the sum of its proper divisors (1).

188222939 is an equidigital number, since it uses as much as digits as its factorization.

188222939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 44.

The square root of 188222939 is about 13719.4365409079. The cubic root of 188222939 is about 573.0917854930.

The spelling of 188222939 in words is "one hundred eighty-eight million, two hundred twenty-two thousand, nine hundred thirty-nine".