128938339 has 2 divisors, whose sum is σ = 128938340. Its totient is φ = 128938338.

The previous prime is 128938301. The next prime is 128938357. The reversal of 128938339 is 933839821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128938339 - 2⁷ = 128938211 is a prime.

It is not a weakly prime, because it can be changed into another prime (128938039) 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, 64469169 + 64469170.

It is an arithmetic number, because the mean of its divisors is an integer number (64469170).

Almost surely, 2^128938339 is an apocalyptic number.

128938339 is a deficient number, since it is larger than the sum of its proper divisors (1).

128938339 is an equidigital number, since it uses as much as digits as its factorization.

128938339 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 46.

The square root of 128938339 is about 11355.1018929819. The cubic root of 128938339 is about 505.1969156580.

The spelling of 128938339 in words is "one hundred twenty-eight million, nine hundred thirty-eight thousand, three hundred thirty-nine".