68529817 has 2 divisors, whose sum is σ = 68529818. Its totient is φ = 68529816.

The previous prime is 68529803. The next prime is 68529823. The reversal of 68529817 is 71892586.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65626201 + 2903616 = 8101^2 + 1704^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68529817 is a prime.

It is not a weakly prime, because it can be changed into another prime (68529017) 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, 34264908 + 34264909.

It is an arithmetic number, because the mean of its divisors is an integer number (34264909).

Almost surely, 2^68529817 is an apocalyptic number.

It is an amenable number.

68529817 is a deficient number, since it is larger than the sum of its proper divisors (1).

68529817 is an equidigital number, since it uses as much as digits as its factorization.

68529817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 46.

The square root of 68529817 is about 8278.2737934910. The cubic root of 68529817 is about 409.2228327643. Note that the first 3 decimals are identical.

The spelling of 68529817 in words is "sixty-eight million, five hundred twenty-nine thousand, eight hundred seventeen".