68679217 has 2 divisors, whose sum is σ = 68679218. Its totient is φ = 68679216.

The previous prime is 68679211. The next prime is 68679227. The reversal of 68679217 is 71297686.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59582961 + 9096256 = 7719^2 + 3016^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68679217 is a prime.

It is not a weakly prime, because it can be changed into another prime (68679211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34339608 + 34339609.

It is an arithmetic number, because the mean of its divisors is an integer number (34339609).

Almost surely, 2^68679217 is an apocalyptic number.

It is an amenable number.

68679217 is a deficient number, since it is larger than the sum of its proper divisors (1).

68679217 is an equidigital number, since it uses as much as digits as its factorization.

68679217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 46.

The square root of 68679217 is about 8287.2925011731. The cubic root of 68679217 is about 409.5199954655.

The spelling of 68679217 in words is "sixty-eight million, six hundred seventy-nine thousand, two hundred seventeen".