8113598621 has 2 divisors, whose sum is σ = 8113598622. Its totient is φ = 8113598620.

The previous prime is 8113598429. The next prime is 8113598737. The reversal of 8113598621 is 1268953118.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7700940025 + 412658596 = 87755^2 + 20314^2 .

It is a cyclic number.

It is not a de Polignac number, because 8113598621 - 2²⁶ = 8046489757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8113538621) 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, 4056799310 + 4056799311.

It is an arithmetic number, because the mean of its divisors is an integer number (4056799311).

Almost surely, 2^8113598621 is an apocalyptic number.

It is an amenable number.

8113598621 is a deficient number, since it is larger than the sum of its proper divisors (1).

8113598621 is an equidigital number, since it uses as much as digits as its factorization.

8113598621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 44.

The square root of 8113598621 is about 90075.5162127867. The cubic root of 8113598621 is about 2009.4220941167.

The spelling of 8113598621 in words is "eight billion, one hundred thirteen million, five hundred ninety-eight thousand, six hundred twenty-one".