68643385 has 8 divisors (see below), whose sum is σ = 85953600. Its totient is φ = 52527024.

The previous prime is 68643353. The next prime is 68643391. The reversal of 68643385 is 58334686.

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 68643385 - 2⁵ = 68643353 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 298335 + ... + 298564.

It is an arithmetic number, because the mean of its divisors is an integer number (10744200).

Almost surely, 2^68643385 is an apocalyptic number.

It is an amenable number.

68643385 is a deficient number, since it is larger than the sum of its proper divisors (17310215).

68643385 is a wasteful number, since it uses less digits than its factorization.

68643385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596927.

The product of its digits is 414720, while the sum is 43.

The square root of 68643385 is about 8285.1303550397. The cubic root of 68643385 is about 409.4487634693.

The spelling of 68643385 in words is "sixty-eight million, six hundred forty-three thousand, three hundred eighty-five".