817682317 has 2 divisors, whose sum is σ = 817682318. Its totient is φ = 817682316.

The previous prime is 817682297. The next prime is 817682329. The reversal of 817682317 is 713286718.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 814189156 + 3493161 = 28534^2 + 1869^2 .

It is a cyclic number.

It is not a de Polignac number, because 817682317 - 2⁷ = 817682189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (817682617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408841158 + 408841159.

It is an arithmetic number, because the mean of its divisors is an integer number (408841159).

Almost surely, 2^817682317 is an apocalyptic number.

It is an amenable number.

817682317 is a deficient number, since it is larger than the sum of its proper divisors (1).

817682317 is an equidigital number, since it uses as much as digits as its factorization.

817682317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 43.

The square root of 817682317 is about 28595.1449900154. The cubic root of 817682317 is about 935.1074893343.

The spelling of 817682317 in words is "eight hundred seventeen million, six hundred eighty-two thousand, three hundred seventeen".