68439079 has 2 divisors, whose sum is σ = 68439080. Its totient is φ = 68439078.

The previous prime is 68439073. The next prime is 68439109. The reversal of 68439079 is 97093486.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68439079 - 2²¹ = 66341927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68439073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34219539 + 34219540.

It is an arithmetic number, because the mean of its divisors is an integer number (34219540).

Almost surely, 2^68439079 is an apocalyptic number.

68439079 is a deficient number, since it is larger than the sum of its proper divisors (1).

68439079 is an equidigital number, since it uses as much as digits as its factorization.

68439079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 68439079 is about 8272.7914877628. The cubic root of 68439079 is about 409.0421403128.

The spelling of 68439079 in words is "sixty-eight million, four hundred thirty-nine thousand, seventy-nine".