68312317 has 2 divisors, whose sum is σ = 68312318. Its totient is φ = 68312316.

The previous prime is 68312297. The next prime is 68312357. The reversal of 68312317 is 71321386.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46090521 + 22221796 = 6789^2 + 4714^2 .

It is a cyclic number.

It is not a de Polignac number, because 68312317 - 2²³ = 59923709 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68312357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34156158 + 34156159.

It is an arithmetic number, because the mean of its divisors is an integer number (34156159).

Almost surely, 2^68312317 is an apocalyptic number.

It is an amenable number.

68312317 is a deficient number, since it is larger than the sum of its proper divisors (1).

68312317 is an equidigital number, since it uses as much as digits as its factorization.

68312317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 68312317 is about 8265.1265568048. The cubic root of 68312317 is about 408.7894433346.

The spelling of 68312317 in words is "sixty-eight million, three hundred twelve thousand, three hundred seventeen".