68839439 has 2 divisors, whose sum is σ = 68839440. Its totient is φ = 68839438.

The previous prime is 68839429. The next prime is 68839447. The reversal of 68839439 is 93493886.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68839439 - 2⁴ = 68839423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68839429) 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, 34419719 + 34419720.

It is an arithmetic number, because the mean of its divisors is an integer number (34419720).

Almost surely, 2^68839439 is an apocalyptic number.

68839439 is a deficient number, since it is larger than the sum of its proper divisors (1).

68839439 is an equidigital number, since it uses as much as digits as its factorization.

68839439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1119744, while the sum is 50.

The square root of 68839439 is about 8296.9535975562. The cubic root of 68839439 is about 409.8382050481.

The spelling of 68839439 in words is "sixty-eight million, eight hundred thirty-nine thousand, four hundred thirty-nine".