8197243213 has 2 divisors, whose sum is σ = 8197243214. Its totient is φ = 8197243212.

The previous prime is 8197243193. The next prime is 8197243237. The reversal of 8197243213 is 3123427918.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6819126084 + 1378117129 = 82578^2 + 37123^2 .

It is a cyclic number.

It is not a de Polignac number, because 8197243213 - 2¹⁷ = 8197112141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8197240213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4098621606 + 4098621607.

It is an arithmetic number, because the mean of its divisors is an integer number (4098621607).

Almost surely, 2^8197243213 is an apocalyptic number.

It is an amenable number.

8197243213 is a deficient number, since it is larger than the sum of its proper divisors (1).

8197243213 is an equidigital number, since it uses as much as digits as its factorization.

8197243213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 40.

The square root of 8197243213 is about 90538.6282920169. The cubic root of 8197243213 is about 2016.3036684745.

The spelling of 8197243213 in words is "eight billion, one hundred ninety-seven million, two hundred forty-three thousand, two hundred thirteen".