8685116173 has 2 divisors, whose sum is σ = 8685116174. Its totient is φ = 8685116172.

The previous prime is 8685116159. The next prime is 8685116177. The reversal of 8685116173 is 3716115868.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6776911684 + 1908204489 = 82322^2 + 43683^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8685116173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8685116177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4342558086 + 4342558087.

It is an arithmetic number, because the mean of its divisors is an integer number (4342558087).

Almost surely, 2^8685116173 is an apocalyptic number.

It is an amenable number.

8685116173 is a deficient number, since it is larger than the sum of its proper divisors (1).

8685116173 is an equidigital number, since it uses as much as digits as its factorization.

8685116173 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 8685116173 is about 93193.9706901686. The cubic root of 8685116173 is about 2055.5365839893.

The spelling of 8685116173 in words is "eight billion, six hundred eighty-five million, one hundred sixteen thousand, one hundred seventy-three".