868128193 has 4 divisors (see below), whose sum is σ = 868231728. Its totient is φ = 868024660.

The previous prime is 868128139. The next prime is 868128227. The reversal of 868128193 is 391821868.

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 not a de Polignac number, because 868128193 - 2²⁹ = 331257281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (868128113) 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, 37963 + ... + 56368.

It is an arithmetic number, because the mean of its divisors is an integer number (217057932).

Almost surely, 2^868128193 is an apocalyptic number.

It is an amenable number.

868128193 is a deficient number, since it is larger than the sum of its proper divisors (103535).

868128193 is an equidigital number, since it uses as much as digits as its factorization.

868128193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103534.

The product of its digits is 165888, while the sum is 46.

The square root of 868128193 is about 29464.0152219619. The cubic root of 868128193 is about 953.9551424365.

The spelling of 868128193 in words is "eight hundred sixty-eight million, one hundred twenty-eight thousand, one hundred ninety-three".