68685017 has 2 divisors, whose sum is σ = 68685018. Its totient is φ = 68685016.

The previous prime is 68685013. The next prime is 68685037. The reversal of 68685017 is 71058686.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68244121 + 440896 = 8261^2 + 664^2 .

It is a cyclic number.

It is not a de Polignac number, because 68685017 - 2² = 68685013 is a prime.

It is not a weakly prime, because it can be changed into another prime (68685011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34342508 + 34342509.

It is an arithmetic number, because the mean of its divisors is an integer number (34342509).

Almost surely, 2^68685017 is an apocalyptic number.

It is an amenable number.

68685017 is a deficient number, since it is larger than the sum of its proper divisors (1).

68685017 is an equidigital number, since it uses as much as digits as its factorization.

68685017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 68685017 is about 8287.6424271321. The cubic root of 68685017 is about 409.5315232086.

The spelling of 68685017 in words is "sixty-eight million, six hundred eighty-five thousand, seventeen".