68929509793 has 2 divisors, whose sum is σ = 68929509794. Its totient is φ = 68929509792.

The previous prime is 68929509721. The next prime is 68929509809. The reversal of 68929509793 is 39790592986.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39651562129 + 29277947664 = 199127^2 + 171108^2 .

It is a cyclic number.

It is not a de Polignac number, because 68929509793 - 2⁹ = 68929509281 is a prime.

It is not a weakly prime, because it can be changed into another prime (68929503793) 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, 34464754896 + 34464754897.

It is an arithmetic number, because the mean of its divisors is an integer number (34464754897).

Almost surely, 2^68929509793 is an apocalyptic number.

It is an amenable number.

68929509793 is a deficient number, since it is larger than the sum of its proper divisors (1).

68929509793 is an equidigital number, since it uses as much as digits as its factorization.

68929509793 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 66134880, while the sum is 67.

The spelling of 68929509793 in words is "sixty-eight billion, nine hundred twenty-nine million, five hundred nine thousand, seven hundred ninety-three".