8190991727 has 2 divisors, whose sum is σ = 8190991728. Its totient is φ = 8190991726.

The previous prime is 8190991703. The next prime is 8190991741. The reversal of 8190991727 is 7271990918.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8190991727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8190991427) 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, 4095495863 + 4095495864.

It is an arithmetic number, because the mean of its divisors is an integer number (4095495864).

Almost surely, 2^8190991727 is an apocalyptic number.

8190991727 is a deficient number, since it is larger than the sum of its proper divisors (1).

8190991727 is an equidigital number, since it uses as much as digits as its factorization.

8190991727 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 571536, while the sum is 53.

The square root of 8190991727 is about 90504.0978464511. The cubic root of 8190991727 is about 2015.7909717264.

The spelling of 8190991727 in words is "eight billion, one hundred ninety million, nine hundred ninety-one thousand, seven hundred twenty-seven".