188939039 has 2 divisors, whose sum is σ = 188939040. Its totient is φ = 188939038.

The previous prime is 188938993. The next prime is 188939053. The reversal of 188939039 is 930939881.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-188939039 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 (188939239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94469519 + 94469520.

It is an arithmetic number, because the mean of its divisors is an integer number (94469520).

Almost surely, 2^188939039 is an apocalyptic number.

188939039 is a deficient number, since it is larger than the sum of its proper divisors (1).

188939039 is an equidigital number, since it uses as much as digits as its factorization.

188939039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 419904, while the sum is 50.

The square root of 188939039 is about 13745.5097759232. The cubic root of 188939039 is about 573.8176475630.

The spelling of 188939039 in words is "one hundred eighty-eight million, nine hundred thirty-nine thousand, thirty-nine".