188425439 has 2 divisors, whose sum is σ = 188425440. Its totient is φ = 188425438.

The previous prime is 188425429. The next prime is 188425459. The reversal of 188425439 is 934524881.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-188425439 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 188425439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188425429) 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, 94212719 + 94212720.

It is an arithmetic number, because the mean of its divisors is an integer number (94212720).

Almost surely, 2^188425439 is an apocalyptic number.

188425439 is a deficient number, since it is larger than the sum of its proper divisors (1).

188425439 is an equidigital number, since it uses as much as digits as its factorization.

188425439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 276480, while the sum is 44.

The square root of 188425439 is about 13726.8145977135. The cubic root of 188425439 is about 573.2972324559.

The spelling of 188425439 in words is "one hundred eighty-eight million, four hundred twenty-five thousand, four hundred thirty-nine".