8168085169 has 2 divisors, whose sum is σ = 8168085170. Its totient is φ = 8168085168.

The previous prime is 8168085071. The next prime is 8168085187. The reversal of 8168085169 is 9615808618.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8115667569 + 52417600 = 90087^2 + 7240^2 .

It is a cyclic number.

It is not a de Polignac number, because 8168085169 - 2⁷ = 8168085041 is a prime.

It is a super-2 number, since 2×8168085169² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8168085869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4084042584 + 4084042585.

It is an arithmetic number, because the mean of its divisors is an integer number (4084042585).

Almost surely, 2^8168085169 is an apocalyptic number.

It is an amenable number.

8168085169 is a deficient number, since it is larger than the sum of its proper divisors (1).

8168085169 is an equidigital number, since it uses as much as digits as its factorization.

8168085169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 829440, while the sum is 52.

The square root of 8168085169 is about 90377.4594077528. The cubic root of 8168085169 is about 2013.9101273047.

The spelling of 8168085169 in words is "eight billion, one hundred sixty-eight million, eighty-five thousand, one hundred sixty-nine".