68243017 has 2 divisors, whose sum is σ = 68243018. Its totient is φ = 68243016.

The previous prime is 68243011. The next prime is 68243027. The reversal of 68243017 is 71034286.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47485881 + 20757136 = 6891^2 + 4556^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68243017 is a prime.

It is equal to p_4020799 and since 68243017 and 4020799 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68243017.

It is not a weakly prime, because it can be changed into another prime (68243011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34121508 + 34121509.

It is an arithmetic number, because the mean of its divisors is an integer number (34121509).

Almost surely, 2^68243017 is an apocalyptic number.

It is an amenable number.

68243017 is a deficient number, since it is larger than the sum of its proper divisors (1).

68243017 is an equidigital number, since it uses as much as digits as its factorization.

68243017 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 31.

The square root of 68243017 is about 8260.9331797322. The cubic root of 68243017 is about 408.6511632770.

The spelling of 68243017 in words is "sixty-eight million, two hundred forty-three thousand, seventeen".