68409907 has 4 divisors (see below), whose sum is σ = 68426640. Its totient is φ = 68393176.

The previous prime is 68409893. The next prime is 68409911. The reversal of 68409907 is 70990486.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 68409907 - 2¹⁵ = 68377139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68409917) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2298 + ... + 11920.

It is an arithmetic number, because the mean of its divisors is an integer number (17106660).

Almost surely, 2^68409907 is an apocalyptic number.

68409907 is a deficient number, since it is larger than the sum of its proper divisors (16733).

68409907 is an equidigital number, since it uses as much as digits as its factorization.

68409907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16732.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 68409907 is about 8271.0281706690. The cubic root of 68409907 is about 408.9840142962.

The spelling of 68409907 in words is "sixty-eight million, four hundred nine thousand, nine hundred seven".