68128859 has 4 divisors (see below), whose sum is σ = 70478160. Its totient is φ = 65779560.

The previous prime is 68128811. The next prime is 68128861. The reversal of 68128859 is 95882186.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95882186 = 2 ⋅47941093.

It is a cyclic number.

It is not a de Polignac number, because 68128859 - 2⁸ = 68128603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68128559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1174607 + ... + 1174664.

It is an arithmetic number, because the mean of its divisors is an integer number (17619540).

Almost surely, 2^68128859 is an apocalyptic number.

68128859 is a deficient number, since it is larger than the sum of its proper divisors (2349301).

68128859 is a wasteful number, since it uses less digits than its factorization.

68128859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2349300.

The product of its digits is 276480, while the sum is 47.

The square root of 68128859 is about 8254.0207777785. The cubic root of 68128859 is about 408.4231700528.

The spelling of 68128859 in words is "sixty-eight million, one hundred twenty-eight thousand, eight hundred fifty-nine".