128395523 has 2 divisors, whose sum is σ = 128395524. Its totient is φ = 128395522.

The previous prime is 128395511. The next prime is 128395537. The reversal of 128395523 is 325593821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128395523 - 2⁴ = 128395507 is a prime.

It is not a weakly prime, because it can be changed into another prime (128395573) 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, 64197761 + 64197762.

It is an arithmetic number, because the mean of its divisors is an integer number (64197762).

Almost surely, 2^128395523 is an apocalyptic number.

128395523 is a deficient number, since it is larger than the sum of its proper divisors (1).

128395523 is an equidigital number, since it uses as much as digits as its factorization.

128395523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 38.

The square root of 128395523 is about 11331.1748287633. The cubic root of 128395523 is about 504.4869776155.

The spelling of 128395523 in words is "one hundred twenty-eight million, three hundred ninety-five thousand, five hundred twenty-three".