68017399 has 2 divisors, whose sum is σ = 68017400. Its totient is φ = 68017398.

The previous prime is 68017381. The next prime is 68017409. The reversal of 68017399 is 99371086.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68017399 - 2⁹ = 68016887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68017309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34008699 + 34008700.

It is an arithmetic number, because the mean of its divisors is an integer number (34008700).

Almost surely, 2^68017399 is an apocalyptic number.

68017399 is a deficient number, since it is larger than the sum of its proper divisors (1).

68017399 is an equidigital number, since it uses as much as digits as its factorization.

68017399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 68017399 is about 8247.2661530958. The cubic root of 68017399 is about 408.2003193393.

The spelling of 68017399 in words is "sixty-eight million, seventeen thousand, three hundred ninety-nine".