68309713 has 2 divisors, whose sum is σ = 68309714. Its totient is φ = 68309712.

The previous prime is 68309699. The next prime is 68309749. The reversal of 68309713 is 31790386.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48888064 + 19421649 = 6992^2 + 4407^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68309713 is a prime.

It is not a weakly prime, because it can be changed into another prime (68306713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34154856 + 34154857.

It is an arithmetic number, because the mean of its divisors is an integer number (34154857).

Almost surely, 2^68309713 is an apocalyptic number.

It is an amenable number.

68309713 is a deficient number, since it is larger than the sum of its proper divisors (1).

68309713 is an equidigital number, since it uses as much as digits as its factorization.

68309713 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 68309713 is about 8264.9690259553. The cubic root of 68309713 is about 408.7842490481.

The spelling of 68309713 in words is "sixty-eight million, three hundred nine thousand, seven hundred thirteen".