68735309 has 2 divisors, whose sum is σ = 68735310. Its totient is φ = 68735308.

The previous prime is 68735297. The next prime is 68735353. The reversal of 68735309 is 90353786.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50055625 + 18679684 = 7075^2 + 4322^2 .

It is a cyclic number.

It is not a de Polignac number, because 68735309 - 2⁸ = 68735053 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68735399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34367654 + 34367655.

It is an arithmetic number, because the mean of its divisors is an integer number (34367655).

Almost surely, 2^68735309 is an apocalyptic number.

It is an amenable number.

68735309 is a deficient number, since it is larger than the sum of its proper divisors (1).

68735309 is an equidigital number, since it uses as much as digits as its factorization.

68735309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 68735309 is about 8290.6760279244. The cubic root of 68735309 is about 409.6314534670.

The spelling of 68735309 in words is "sixty-eight million, seven hundred thirty-five thousand, three hundred nine".