188900057 has 2 divisors, whose sum is σ = 188900058. Its totient is φ = 188900056.

The previous prime is 188900053. The next prime is 188900077. The reversal of 188900057 is 750009881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 182223001 + 6677056 = 13499^2 + 2584^2 .

It is a cyclic number.

It is not a de Polignac number, because 188900057 - 2² = 188900053 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (188900051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94450028 + 94450029.

It is an arithmetic number, because the mean of its divisors is an integer number (94450029).

Almost surely, 2^188900057 is an apocalyptic number.

It is an amenable number.

188900057 is a deficient number, since it is larger than the sum of its proper divisors (1).

188900057 is an equidigital number, since it uses as much as digits as its factorization.

188900057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 38.

The square root of 188900057 is about 13744.0917124414. The cubic root of 188900057 is about 573.7781813976.

The spelling of 188900057 in words is "one hundred eighty-eight million, nine hundred thousand, fifty-seven".