68385407 has 4 divisors (see below), whose sum is σ = 72408096. Its totient is φ = 64362720.

The previous prime is 68385397. The next prime is 68385413. The reversal of 68385407 is 70458386.

It is a happy number.

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 68385407 - 2⁸ = 68385151 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 (68385607) 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, 2011319 + ... + 2011352.

It is an arithmetic number, because the mean of its divisors is an integer number (18102024).

Almost surely, 2^68385407 is an apocalyptic number.

68385407 is a deficient number, since it is larger than the sum of its proper divisors (4022689).

68385407 is a wasteful number, since it uses less digits than its factorization.

68385407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4022688.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 68385407 is about 8269.5469646166. The cubic root of 68385407 is about 408.9351846008.

The spelling of 68385407 in words is "sixty-eight million, three hundred eighty-five thousand, four hundred seven".