128458433 has 2 divisors, whose sum is σ = 128458434. Its totient is φ = 128458432.

The previous prime is 128458423. The next prime is 128458439. The reversal of 128458433 is 334854821.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81577024 + 46881409 = 9032^2 + 6847^2 .

It is a cyclic number.

It is not a de Polignac number, because 128458433 - 2⁸ = 128458177 is a prime.

It is not a weakly prime, because it can be changed into another prime (128458439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64229216 + 64229217.

It is an arithmetic number, because the mean of its divisors is an integer number (64229217).

Almost surely, 2^128458433 is an apocalyptic number.

It is an amenable number.

128458433 is a deficient number, since it is larger than the sum of its proper divisors (1).

128458433 is an equidigital number, since it uses as much as digits as its factorization.

128458433 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 92160, while the sum is 38.

The square root of 128458433 is about 11333.9504586883. The cubic root of 128458433 is about 504.5693587167.

The spelling of 128458433 in words is "one hundred twenty-eight million, four hundred fifty-eight thousand, four hundred thirty-three".