8218173013 has 2 divisors, whose sum is σ = 8218173014. Its totient is φ = 8218173012.

The previous prime is 8218172983. The next prime is 8218173017. The reversal of 8218173013 is 3103718128.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8070866244 + 147306769 = 89838^2 + 12137^2 .

It is a cyclic number.

It is not a de Polignac number, because 8218173013 - 2⁵ = 8218172981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8218173013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8218173017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4109086506 + 4109086507.

It is an arithmetic number, because the mean of its divisors is an integer number (4109086507).

Almost surely, 2^8218173013 is an apocalyptic number.

It is an amenable number.

8218173013 is a deficient number, since it is larger than the sum of its proper divisors (1).

8218173013 is an equidigital number, since it uses as much as digits as its factorization.

8218173013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 8218173013 is about 90654.1395248998. The cubic root of 8218173013 is about 2018.0182679456.

The spelling of 8218173013 in words is "eight billion, two hundred eighteen million, one hundred seventy-three thousand, thirteen".