8321719291 has 2 divisors, whose sum is σ = 8321719292. Its totient is φ = 8321719290.

The previous prime is 8321719277. The next prime is 8321719303. The reversal of 8321719291 is 1929171238.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8321719291 - 2⁷ = 8321719163 is a prime.

It is not a weakly prime, because it can be changed into another prime (8321719261) 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, 4160859645 + 4160859646.

It is an arithmetic number, because the mean of its divisors is an integer number (4160859646).

Almost surely, 2^8321719291 is an apocalyptic number.

8321719291 is a deficient number, since it is larger than the sum of its proper divisors (1).

8321719291 is an equidigital number, since it uses as much as digits as its factorization.

8321719291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 43.

The square root of 8321719291 is about 91223.4580083434. The cubic root of 8321719291 is about 2026.4583746173.

The spelling of 8321719291 in words is "eight billion, three hundred twenty-one million, seven hundred nineteen thousand, two hundred ninety-one".