128693975 has 12 divisors (see below), whose sum is σ = 160224120. Its totient is φ = 102540000.

The previous prime is 128693959. The next prime is 128694001. The reversal of 128693975 is 579396821.

It is not a de Polignac number, because 128693975 - 2⁴ = 128693959 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3980 + ... + 16529.

It is an arithmetic number, because the mean of its divisors is an integer number (13352010).

Almost surely, 2^128693975 is an apocalyptic number.

128693975 is a deficient number, since it is larger than the sum of its proper divisors (31530145).

128693975 is a wasteful number, since it uses less digits than its factorization.

128693975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20770 (or 20765 counting only the distinct ones).

The product of its digits is 816480, while the sum is 50.

The square root of 128693975 is about 11344.3366928173. The cubic root of 128693975 is about 504.8775640181.

The spelling of 128693975 in words is "one hundred twenty-eight million, six hundred ninety-three thousand, nine hundred seventy-five".