128841439 has 2 divisors, whose sum is σ = 128841440. Its totient is φ = 128841438.

The previous prime is 128841407. The next prime is 128841443. The reversal of 128841439 is 934148821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128841439 - 2⁵ = 128841407 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 (128821439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64420719 + 64420720.

It is an arithmetic number, because the mean of its divisors is an integer number (64420720).

Almost surely, 2^128841439 is an apocalyptic number.

128841439 is a deficient number, since it is larger than the sum of its proper divisors (1).

128841439 is an equidigital number, since it uses as much as digits as its factorization.

128841439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 40.

The square root of 128841439 is about 11350.8342865183. The cubic root of 128841439 is about 505.0703284075.

The spelling of 128841439 in words is "one hundred twenty-eight million, eight hundred forty-one thousand, four hundred thirty-nine".