8191290071 has 2 divisors, whose sum is σ = 8191290072. Its totient is φ = 8191290070.

The previous prime is 8191290067. The next prime is 8191290073. The reversal of 8191290071 is 1700921918.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8191290071 - 2² = 8191290067 is a prime.

It is a Sophie Germain prime.

Together with 8191290073, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8191290073) 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, 4095645035 + 4095645036.

It is an arithmetic number, because the mean of its divisors is an integer number (4095645036).

Almost surely, 2^8191290071 is an apocalyptic number.

8191290071 is a deficient number, since it is larger than the sum of its proper divisors (1).

8191290071 is an equidigital number, since it uses as much as digits as its factorization.

8191290071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 38.

The square root of 8191290071 is about 90505.7460662029. The cubic root of 8191290071 is about 2015.8154454353.

The spelling of 8191290071 in words is "eight billion, one hundred ninety-one million, two hundred ninety thousand, seventy-one".