68795809 has 2 divisors, whose sum is σ = 68795810. Its totient is φ = 68795808.

The previous prime is 68795791. The next prime is 68795849. The reversal of 68795809 is 90859786.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52417600 + 16378209 = 7240^2 + 4047^2 .

It is a cyclic number.

It is not a de Polignac number, because 68795809 - 2⁵ = 68795777 is a prime.

It is not a weakly prime, because it can be changed into another prime (68795849) 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, 34397904 + 34397905.

It is an arithmetic number, because the mean of its divisors is an integer number (34397905).

Almost surely, 2^68795809 is an apocalyptic number.

It is an amenable number.

68795809 is a deficient number, since it is larger than the sum of its proper divisors (1).

68795809 is an equidigital number, since it uses as much as digits as its factorization.

68795809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1088640, while the sum is 52.

The square root of 68795809 is about 8294.3239025251. The cubic root of 68795809 is about 409.7516024642.

The spelling of 68795809 in words is "sixty-eight million, seven hundred ninety-five thousand, eight hundred nine".