68879759 has 4 divisors (see below), whose sum is σ = 74178216. Its totient is φ = 63581304.

The previous prime is 68879753. The next prime is 68879761. The reversal of 68879759 is 95797886.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68879759 - 2¹² = 68875663 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68879698 and 68879707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68879753) 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, 2649209 + ... + 2649234.

It is an arithmetic number, because the mean of its divisors is an integer number (18544554).

Almost surely, 2^68879759 is an apocalyptic number.

68879759 is a deficient number, since it is larger than the sum of its proper divisors (5298457).

68879759 is a wasteful number, since it uses less digits than its factorization.

68879759 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5298456.

The product of its digits is 7620480, while the sum is 59.

The square root of 68879759 is about 8299.3830493598. The cubic root of 68879759 is about 409.9182049798.

The spelling of 68879759 in words is "sixty-eight million, eight hundred seventy-nine thousand, seven hundred fifty-nine".