128910589 has 2 divisors, whose sum is σ = 128910590. Its totient is φ = 128910588.

The previous prime is 128910571. The next prime is 128910619. The reversal of 128910589 is 985019821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103327225 + 25583364 = 10165^2 + 5058^2 .

It is a cyclic number.

It is not a de Polignac number, because 128910589 - 2⁵ = 128910557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128910289) 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, 64455294 + 64455295.

It is an arithmetic number, because the mean of its divisors is an integer number (64455295).

Almost surely, 2^128910589 is an apocalyptic number.

It is an amenable number.

128910589 is a deficient number, since it is larger than the sum of its proper divisors (1).

128910589 is an equidigital number, since it uses as much as digits as its factorization.

128910589 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 43.

The square root of 128910589 is about 11353.8799095287. The cubic root of 128910589 is about 505.1606703737.

The spelling of 128910589 in words is "one hundred twenty-eight million, nine hundred ten thousand, five hundred eighty-nine".