128839339 has 2 divisors, whose sum is σ = 128839340. Its totient is φ = 128839338.

The previous prime is 128839327. The next prime is 128839349. The reversal of 128839339 is 933938821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128839339 - 2⁷ = 128839211 is a prime.

It is not a weakly prime, because it can be changed into another prime (128839349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64419669 + 64419670.

It is an arithmetic number, because the mean of its divisors is an integer number (64419670).

Almost surely, 2^128839339 is an apocalyptic number.

128839339 is a deficient number, since it is larger than the sum of its proper divisors (1).

128839339 is an equidigital number, since it uses as much as digits as its factorization.

128839339 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 128839339 is about 11350.7417819277. The cubic root of 128839339 is about 505.0675843280.

It can be divided in two parts, 12883 and 9339, that added together give a palindrome (22222).

The spelling of 128839339 in words is "one hundred twenty-eight million, eight hundred thirty-nine thousand, three hundred thirty-nine".