68439727 has 2 divisors, whose sum is σ = 68439728. Its totient is φ = 68439726.

The previous prime is 68439719. The next prime is 68439731. The reversal of 68439727 is 72793486.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68439727 - 2³ = 68439719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68439737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34219863 + 34219864.

It is an arithmetic number, because the mean of its divisors is an integer number (34219864).

Almost surely, 2^68439727 is an apocalyptic number.

68439727 is a deficient number, since it is larger than the sum of its proper divisors (1).

68439727 is an equidigital number, since it uses as much as digits as its factorization.

68439727 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 46.

The square root of 68439727 is about 8272.8306522012. The cubic root of 68439727 is about 409.0434312832.

The spelling of 68439727 in words is "sixty-eight million, four hundred thirty-nine thousand, seven hundred twenty-seven".