128433089 has 2 divisors, whose sum is σ = 128433090. Its totient is φ = 128433088.

The previous prime is 128433023. The next prime is 128433139. The reversal of 128433089 is 980334821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88642225 + 39790864 = 9415^2 + 6308^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128433089 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (128433889) 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, 64216544 + 64216545.

It is an arithmetic number, because the mean of its divisors is an integer number (64216545).

Almost surely, 2^128433089 is an apocalyptic number.

It is an amenable number.

128433089 is a deficient number, since it is larger than the sum of its proper divisors (1).

128433089 is an equidigital number, since it uses as much as digits as its factorization.

128433089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 128433089 is about 11332.8323467702. The cubic root of 128433089 is about 504.5361738008.

The spelling of 128433089 in words is "one hundred twenty-eight million, four hundred thirty-three thousand, eighty-nine".