128568793 has 4 divisors (see below), whose sum is σ = 128694528. Its totient is φ = 128443060.

The previous prime is 128568731. The next prime is 128568833. The reversal of 128568793 is 397865821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128568793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128568703) 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 in 3 ways as a sum of consecutive naturals, for example, 61321 + ... + 63382.

It is an arithmetic number, because the mean of its divisors is an integer number (32173632).

Almost surely, 2^128568793 is an apocalyptic number.

It is an amenable number.

128568793 is a deficient number, since it is larger than the sum of its proper divisors (125735).

128568793 is a wasteful number, since it uses less digits than its factorization.

128568793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125734.

The product of its digits is 725760, while the sum is 49.

The square root of 128568793 is about 11338.8179719052. The cubic root of 128568793 is about 504.7138109841.

The spelling of 128568793 in words is "one hundred twenty-eight million, five hundred sixty-eight thousand, seven hundred ninety-three".