68308117 has 2 divisors, whose sum is σ = 68308118. Its totient is φ = 68308116.

The previous prime is 68308103. The next prime is 68308147. The reversal of 68308117 is 71180386.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62504836 + 5803281 = 7906^2 + 2409^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68308117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68308147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34154058 + 34154059.

It is an arithmetic number, because the mean of its divisors is an integer number (34154059).

Almost surely, 2^68308117 is an apocalyptic number.

It is an amenable number.

68308117 is a deficient number, since it is larger than the sum of its proper divisors (1).

68308117 is an equidigital number, since it uses as much as digits as its factorization.

68308117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 68308117 is about 8264.8724733053. The cubic root of 68308117 is about 408.7810653879.

The spelling of 68308117 in words is "sixty-eight million, three hundred eight thousand, one hundred seventeen".