68019439 has 2 divisors, whose sum is σ = 68019440. Its totient is φ = 68019438.

The previous prime is 68019433. The next prime is 68019443. The reversal of 68019439 is 93491086.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68019439 - 2⁷ = 68019311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68019433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34009719 + 34009720.

It is an arithmetic number, because the mean of its divisors is an integer number (34009720).

Almost surely, 2^68019439 is an apocalyptic number.

68019439 is a deficient number, since it is larger than the sum of its proper divisors (1).

68019439 is an equidigital number, since it uses as much as digits as its factorization.

68019439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 68019439 is about 8247.3898295158. The cubic root of 68019439 is about 408.2044002575.

The spelling of 68019439 in words is "sixty-eight million, nineteen thousand, four hundred thirty-nine".