68668289 has 8 divisors (see below), whose sum is σ = 70113600. Its totient is φ = 67236400.

The previous prime is 68668283. The next prime is 68668297. The reversal of 68668289 is 98286686.

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

It is a cyclic number.

It is not a de Polignac number, because 68668289 - 2⁴ = 68668273 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 68668289.

It is not an unprimeable number, because it can be changed into a prime (68668283) 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, 7334 + ... + 13824.

It is an arithmetic number, because the mean of its divisors is an integer number (8764200).

Almost surely, 2^68668289 is an apocalyptic number.

It is an amenable number.

68668289 is a deficient number, since it is larger than the sum of its proper divisors (1445311).

68668289 is a wasteful number, since it uses less digits than its factorization.

68668289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6711.

The product of its digits is 1990656, while the sum is 53.

The square root of 68668289 is about 8286.6331522519. The cubic root of 68668289 is about 409.4982738439.

The spelling of 68668289 in words is "sixty-eight million, six hundred sixty-eight thousand, two hundred eighty-nine".