68506579 has 2 divisors, whose sum is σ = 68506580. Its totient is φ = 68506578.

The previous prime is 68506561. The next prime is 68506619. The reversal of 68506579 is 97560586.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68506579 - 2⁵ = 68506547 is a prime.

It is not a weakly prime, because it can be changed into another prime (68506279) 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, 34253289 + 34253290.

It is an arithmetic number, because the mean of its divisors is an integer number (34253290).

Almost surely, 2^68506579 is an apocalyptic number.

68506579 is a deficient number, since it is larger than the sum of its proper divisors (1).

68506579 is an equidigital number, since it uses as much as digits as its factorization.

68506579 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 453600, while the sum is 46.

The square root of 68506579 is about 8276.8701210059. The cubic root of 68506579 is about 409.1765726317.

The spelling of 68506579 in words is "sixty-eight million, five hundred six thousand, five hundred seventy-nine".