188500189 has 2 divisors, whose sum is σ = 188500190. Its totient is φ = 188500188.

The previous prime is 188500153. The next prime is 188500219. The reversal of 188500189 is 981005881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137663289 + 50836900 = 11733^2 + 7130^2 .

It is a cyclic number.

It is not a de Polignac number, because 188500189 - 2⁷ = 188500061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188500129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94250094 + 94250095.

It is an arithmetic number, because the mean of its divisors is an integer number (94250095).

Almost surely, 2^188500189 is an apocalyptic number.

It is an amenable number.

188500189 is a deficient number, since it is larger than the sum of its proper divisors (1).

188500189 is an equidigital number, since it uses as much as digits as its factorization.

188500189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 40.

The square root of 188500189 is about 13729.5371007183. The cubic root of 188500189 is about 573.3730330887.

The spelling of 188500189 in words is "one hundred eighty-eight million, five hundred thousand, one hundred eighty-nine".