8398522613 has 4 divisors (see below), whose sum is σ = 9044562828. Its totient is φ = 7752482400.

The previous prime is 8398522591. The next prime is 8398522651. The reversal of 8398522613 is 3162258938.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1504043524 + 6894479089 = 38782^2 + 83033^2 .

It is not a de Polignac number, because 8398522613 - 2⁶ = 8398522549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8398522673) 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 in 3 ways as a sum of consecutive naturals, for example, 323020088 + ... + 323020113.

It is an arithmetic number, because the mean of its divisors is an integer number (2261140707).

Almost surely, 2^8398522613 is an apocalyptic number.

It is an amenable number.

8398522613 is a deficient number, since it is larger than the sum of its proper divisors (646040215).

8398522613 is a wasteful number, since it uses less digits than its factorization.

8398522613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646040214.

The product of its digits is 622080, while the sum is 47.

The square root of 8398522613 is about 91643.4537378421. The cubic root of 8398522613 is about 2032.6735311847.

The spelling of 8398522613 in words is "eight billion, three hundred ninety-eight million, five hundred twenty-two thousand, six hundred thirteen".