68842717 has 2 divisors, whose sum is σ = 68842718. Its totient is φ = 68842716.

The previous prime is 68842691. The next prime is 68842721. The reversal of 68842717 is 71724886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54257956 + 14584761 = 7366^2 + 3819^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68842717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68842777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34421358 + 34421359.

It is an arithmetic number, because the mean of its divisors is an integer number (34421359).

Almost surely, 2^68842717 is an apocalyptic number.

It is an amenable number.

68842717 is a deficient number, since it is larger than the sum of its proper divisors (1).

68842717 is an equidigital number, since it uses as much as digits as its factorization.

68842717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 150528, while the sum is 43.

The square root of 68842717 is about 8297.1511375893. The cubic root of 68842717 is about 409.8447101772.

The spelling of 68842717 in words is "sixty-eight million, eight hundred forty-two thousand, seven hundred seventeen".