128825423 has 2 divisors, whose sum is σ = 128825424. Its totient is φ = 128825422.

The previous prime is 128825407. The next prime is 128825443. The reversal of 128825423 is 324528821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128825423 - 2⁴ = 128825407 is a prime.

It is a super-2 number, since 2×128825423² = 33191979222257858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128825443) 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, 64412711 + 64412712.

It is an arithmetic number, because the mean of its divisors is an integer number (64412712).

Almost surely, 2^128825423 is an apocalyptic number.

128825423 is a deficient number, since it is larger than the sum of its proper divisors (1).

128825423 is an equidigital number, since it uses as much as digits as its factorization.

128825423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30720, while the sum is 35.

The square root of 128825423 is about 11350.1287657894. The cubic root of 128825423 is about 505.0493994743.

The spelling of 128825423 in words is "one hundred twenty-eight million, eight hundred twenty-five thousand, four hundred twenty-three".