188808929 has 2 divisors, whose sum is σ = 188808930. Its totient is φ = 188808928.

The previous prime is 188808911. The next prime is 188808943. The reversal of 188808929 is 929808881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161976529 + 26832400 = 12727^2 + 5180^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-188808929 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (188808979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94404464 + 94404465.

It is an arithmetic number, because the mean of its divisors is an integer number (94404465).

Almost surely, 2^188808929 is an apocalyptic number.

It is an amenable number.

188808929 is a deficient number, since it is larger than the sum of its proper divisors (1).

188808929 is an equidigital number, since it uses as much as digits as its factorization.

188808929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 663552, while the sum is 53.

The square root of 188808929 is about 13740.7761425620. The cubic root of 188808929 is about 573.6859003801.

The spelling of 188808929 in words is "one hundred eighty-eight million, eight hundred eight thousand, nine hundred twenty-nine".