8205260813 has 2 divisors, whose sum is σ = 8205260814. Its totient is φ = 8205260812.

The previous prime is 8205260807. The next prime is 8205260887. The reversal of 8205260813 is 3180625028.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4430632969 + 3774627844 = 66563^2 + 61438^2 .

It is a cyclic number.

It is not a de Polignac number, because 8205260813 - 2¹⁰ = 8205259789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8205260113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4102630406 + 4102630407.

It is an arithmetic number, because the mean of its divisors is an integer number (4102630407).

Almost surely, 2^8205260813 is an apocalyptic number.

It is an amenable number.

8205260813 is a deficient number, since it is larger than the sum of its proper divisors (1).

8205260813 is an equidigital number, since it uses as much as digits as its factorization.

8205260813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 8205260813 is about 90582.8947042431. The cubic root of 8205260813 is about 2016.9608263420.

The spelling of 8205260813 in words is "eight billion, two hundred five million, two hundred sixty thousand, eight hundred thirteen".