68210879 has 4 divisors (see below), whose sum is σ = 74411880. Its totient is φ = 62009880.

The previous prime is 68210843. The next prime is 68210887. The reversal of 68210879 is 97801286.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68210879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68210809) 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, 3100484 + ... + 3100505.

It is an arithmetic number, because the mean of its divisors is an integer number (18602970).

Almost surely, 2^68210879 is an apocalyptic number.

68210879 is a deficient number, since it is larger than the sum of its proper divisors (6201001).

68210879 is a wasteful number, since it uses less digits than its factorization.

68210879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6201000.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 68210879 is about 8258.9877709075. The cubic root of 68210879 is about 408.5870038761.

The spelling of 68210879 in words is "sixty-eight million, two hundred ten thousand, eight hundred seventy-nine".