8399812913 has 2 divisors, whose sum is σ = 8399812914. Its totient is φ = 8399812912.

The previous prime is 8399812871. The next prime is 8399812921. The reversal of 8399812913 is 3192189938.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6038533264 + 2361279649 = 77708^2 + 48593^2 .

It is a cyclic number.

It is not a de Polignac number, because 8399812913 - 2⁶ = 8399812849 is a prime.

It is not a weakly prime, because it can be changed into another prime (8399812933) 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, 4199906456 + 4199906457.

It is an arithmetic number, because the mean of its divisors is an integer number (4199906457).

Almost surely, 2^8399812913 is an apocalyptic number.

It is an amenable number.

8399812913 is a deficient number, since it is larger than the sum of its proper divisors (1).

8399812913 is an equidigital number, since it uses as much as digits as its factorization.

8399812913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 53.

The square root of 8399812913 is about 91650.4932501730. The cubic root of 8399812913 is about 2032.7776218871. Note that the first 3 decimals are identical.

The spelling of 8399812913 in words is "eight billion, three hundred ninety-nine million, eight hundred twelve thousand, nine hundred thirteen".