128985023 has 2 divisors, whose sum is σ = 128985024. Its totient is φ = 128985022.

The previous prime is 128985019. The next prime is 128985037. The reversal of 128985023 is 320589821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128985023 - 2² = 128985019 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128985083) 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, 64492511 + 64492512.

It is an arithmetic number, because the mean of its divisors is an integer number (64492512).

Almost surely, 2^128985023 is an apocalyptic number.

128985023 is a deficient number, since it is larger than the sum of its proper divisors (1).

128985023 is an equidigital number, since it uses as much as digits as its factorization.

128985023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 128985023 is about 11357.1573468012. The cubic root of 128985023 is about 505.2578795968.

The spelling of 128985023 in words is "one hundred twenty-eight million, nine hundred eighty-five thousand, twenty-three".