8221365749239 has 2 divisors, whose sum is σ = 8221365749240. Its totient is φ = 8221365749238.

The previous prime is 8221365749173. The next prime is 8221365749243. The reversal of 8221365749239 is 9329475631228.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8221365749239 - 2⁹ = 8221365748727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8221365749539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4110682874619 + 4110682874620.

It is an arithmetic number, because the mean of its divisors is an integer number (4110682874620).

Almost surely, 2^{8221365749239} is an apocalyptic number.

8221365749239 is a deficient number, since it is larger than the sum of its proper divisors (1).

8221365749239 is an equidigital number, since it uses as much as digits as its factorization.

8221365749239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39191040, while the sum is 61.

The spelling of 8221365749239 in words is "eight trillion, two hundred twenty-one billion, three hundred sixty-five million, seven hundred forty-nine thousand, two hundred thirty-nine".