809968093974719 has 2 divisors, whose sum is σ = 809968093974720. Its totient is φ = 809968093974718.

The previous prime is 809968093974703. The next prime is 809968093974821. The reversal of 809968093974719 is 917479390869908.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 809968093974719 - 2⁴ = 809968093974703 is a prime.

It is a super-2 number, since 2×809968093974719² (a number of 31 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (809968093976719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404984046987359 + 404984046987360.

It is an arithmetic number, because the mean of its divisors is an integer number (404984046987360).

Almost surely, 2^{809968093974719} is an apocalyptic number.

809968093974719 is a deficient number, since it is larger than the sum of its proper divisors (1).

809968093974719 is an equidigital number, since it uses as much as digits as its factorization.

809968093974719 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13332791808, while the sum is 89.

The spelling of 809968093974719 in words is "eight hundred nine trillion, nine hundred sixty-eight billion, ninety-three million, nine hundred seventy-four thousand, seven hundred nineteen".