68528879 has 8 divisors (see below), whose sum is σ = 70835712. Its totient is φ = 66228120.

The previous prime is 68528861. The next prime is 68528893. The reversal of 68528879 is 97882586.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68528879 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68528879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68528849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38912 + ... + 40634.

It is an arithmetic number, because the mean of its divisors is an integer number (8854464).

Almost surely, 2^68528879 is an apocalyptic number.

68528879 is a deficient number, since it is larger than the sum of its proper divisors (2306833).

68528879 is a wasteful number, since it uses less digits than its factorization.

68528879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3037.

The product of its digits is 1935360, while the sum is 53.

The square root of 68528879 is about 8278.2171389738. The cubic root of 68528879 is about 409.2209656803.

The spelling of 68528879 in words is "sixty-eight million, five hundred twenty-eight thousand, eight hundred seventy-nine".