68316391 has 12 divisors (see below), whose sum is σ = 80703000. Its totient is φ = 57326880.

The previous prime is 68316389. The next prime is 68316433. The reversal of 68316391 is 19361386.

It is not a de Polignac number, because 68316391 - 2¹ = 68316389 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 68316391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68316301) 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 11 ways as a sum of consecutive naturals, for example, 16516 + ... + 20233.

It is an arithmetic number, because the mean of its divisors is an integer number (6725250).

Almost surely, 2^68316391 is an apocalyptic number.

68316391 is a deficient number, since it is larger than the sum of its proper divisors (12386609).

68316391 is a wasteful number, since it uses less digits than its factorization.

68316391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36786 (or 36773 counting only the distinct ones).

The product of its digits is 23328, while the sum is 37.

The square root of 68316391 is about 8265.3730103366. The cubic root of 68316391 is about 408.7975696148.

The spelling of 68316391 in words is "sixty-eight million, three hundred sixteen thousand, three hundred ninety-one".