188214989 has 2 divisors, whose sum is σ = 188214990. Its totient is φ = 188214988.

The previous prime is 188214979. The next prime is 188215021. The reversal of 188214989 is 989412881.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133010089 + 55204900 = 11533^2 + 7430^2 .

It is an emirp because it is prime and its reverse (989412881) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-188214989 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188214979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94107494 + 94107495.

It is an arithmetic number, because the mean of its divisors is an integer number (94107495).

Almost surely, 2^188214989 is an apocalyptic number.

It is an amenable number.

188214989 is a deficient number, since it is larger than the sum of its proper divisors (1).

188214989 is an equidigital number, since it uses as much as digits as its factorization.

188214989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 331776, while the sum is 50.

The square root of 188214989 is about 13719.1468029174. The cubic root of 188214989 is about 573.0837167920.

The spelling of 188214989 in words is "one hundred eighty-eight million, two hundred fourteen thousand, nine hundred eighty-nine".