68040017 has 2 divisors, whose sum is σ = 68040018. Its totient is φ = 68040016.

The previous prime is 68039989. The next prime is 68040019. The reversal of 68040017 is 71004086.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43349056 + 24690961 = 6584^2 + 4969^2 .

It is a cyclic number.

It is not a de Polignac number, because 68040017 - 2⁶ = 68039953 is a prime.

Together with 68040019, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68040019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34020008 + 34020009.

It is an arithmetic number, because the mean of its divisors is an integer number (34020009).

Almost surely, 2^68040017 is an apocalyptic number.

It is an amenable number.

68040017 is a deficient number, since it is larger than the sum of its proper divisors (1).

68040017 is an equidigital number, since it uses as much as digits as its factorization.

68040017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 68040017 is about 8248.6372813938. The cubic root of 68040017 is about 408.2455609577.

The spelling of 68040017 in words is "sixty-eight million, forty thousand, seventeen".