8191796191 has 2 divisors, whose sum is σ = 8191796192. Its totient is φ = 8191796190.

The previous prime is 8191796167. The next prime is 8191796213. The reversal of 8191796191 is 1916971918.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8191796191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8191796111) 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, 4095898095 + 4095898096.

It is an arithmetic number, because the mean of its divisors is an integer number (4095898096).

Almost surely, 2^8191796191 is an apocalyptic number.

8191796191 is a deficient number, since it is larger than the sum of its proper divisors (1).

8191796191 is an equidigital number, since it uses as much as digits as its factorization.

8191796191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 52.

The square root of 8191796191 is about 90508.5420885786. The cubic root of 8191796191 is about 2015.8569620337.

The spelling of 8191796191 in words is "eight billion, one hundred ninety-one million, seven hundred ninety-six thousand, one hundred ninety-one".