68243717 has 2 divisors, whose sum is σ = 68243718. Its totient is φ = 68243716.

The previous prime is 68243657. The next prime is 68243723. The reversal of 68243717 is 71734286.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66569281 + 1674436 = 8159^2 + 1294^2 .

It is a cyclic number.

It is not a de Polignac number, because 68243717 - 2¹⁰ = 68242693 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 (68243017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34121858 + 34121859.

It is an arithmetic number, because the mean of its divisors is an integer number (34121859).

Almost surely, 2^68243717 is an apocalyptic number.

It is an amenable number.

68243717 is a deficient number, since it is larger than the sum of its proper divisors (1).

68243717 is an equidigital number, since it uses as much as digits as its factorization.

68243717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 38.

The square root of 68243717 is about 8260.9755477183. The cubic root of 68243717 is about 408.6525605132.

The spelling of 68243717 in words is "sixty-eight million, two hundred forty-three thousand, seven hundred seventeen".