68738689 has 2 divisors, whose sum is σ = 68738690. Its totient is φ = 68738688.

The previous prime is 68738653. The next prime is 68738699. The reversal of 68738689 is 98683786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57881664 + 10857025 = 7608^2 + 3295^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68738689 is a prime.

It is not a weakly prime, because it can be changed into another prime (68738699) 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, 34369344 + 34369345.

It is an arithmetic number, because the mean of its divisors is an integer number (34369345).

Almost surely, 2^68738689 is an apocalyptic number.

It is an amenable number.

68738689 is a deficient number, since it is larger than the sum of its proper divisors (1).

68738689 is an equidigital number, since it uses as much as digits as its factorization.

68738689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3483648, while the sum is 55.

The square root of 68738689 is about 8290.8798688680. The cubic root of 68738689 is about 409.6381677823.

The spelling of 68738689 in words is "sixty-eight million, seven hundred thirty-eight thousand, six hundred eighty-nine".