68770217 has 2 divisors, whose sum is σ = 68770218. Its totient is φ = 68770216.

The previous prime is 68770159. The next prime is 68770267. The reversal of 68770217 is 71207786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37589161 + 31181056 = 6131^2 + 5584^2 .

It is a cyclic number.

It is not a de Polignac number, because 68770217 - 2¹⁰ = 68769193 is a prime.

It is not a weakly prime, because it can be changed into another prime (68770267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34385108 + 34385109.

It is an arithmetic number, because the mean of its divisors is an integer number (34385109).

Almost surely, 2^68770217 is an apocalyptic number.

It is an amenable number.

68770217 is a deficient number, since it is larger than the sum of its proper divisors (1).

68770217 is an equidigital number, since it uses as much as digits as its factorization.

68770217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32928, while the sum is 38.

The square root of 68770217 is about 8292.7810172463. The cubic root of 68770217 is about 409.7007870451.

The spelling of 68770217 in words is "sixty-eight million, seven hundred seventy thousand, two hundred seventeen".