8191717159 has 2 divisors, whose sum is σ = 8191717160. Its totient is φ = 8191717158.

The previous prime is 8191717141. The next prime is 8191717201. The reversal of 8191717159 is 9517171918.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8191717159 - 2⁷ = 8191717031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8191717129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4095858579 + 4095858580.

It is an arithmetic number, because the mean of its divisors is an integer number (4095858580).

Almost surely, 2^8191717159 is an apocalyptic number.

8191717159 is a deficient number, since it is larger than the sum of its proper divisors (1).

8191717159 is an equidigital number, since it uses as much as digits as its factorization.

8191717159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 158760, while the sum is 49.

The square root of 8191717159 is about 90508.1054878512. The cubic root of 8191717159 is about 2015.8504792178.

The spelling of 8191717159 in words is "eight billion, one hundred ninety-one million, seven hundred seventeen thousand, one hundred fifty-nine".