8243317345 has 4 divisors (see below), whose sum is σ = 9891980820. Its totient is φ = 6594653872.

The previous prime is 8243317307. The next prime is 8243317349. The reversal of 8243317345 is 5437133428.

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 6075111249 + 2168206096 = 77943^2 + 46564^2 .

It is a cyclic number.

It is not a de Polignac number, because 8243317345 - 2²¹ = 8241220193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8243317298 and 8243317307.

It is not an unprimeable number, because it can be changed into a prime (8243317349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 824331730 + ... + 824331739.

It is an arithmetic number, because the mean of its divisors is an integer number (2472995205).

Almost surely, 2^8243317345 is an apocalyptic number.

It is an amenable number.

8243317345 is a deficient number, since it is larger than the sum of its proper divisors (1648663475).

8243317345 is a wasteful number, since it uses less digits than its factorization.

8243317345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1648663474.

The product of its digits is 241920, while the sum is 40.

The square root of 8243317345 is about 90792.7163653561. The cubic root of 8243317345 is about 2020.0742828776.

The spelling of 8243317345 in words is "eight billion, two hundred forty-three million, three hundred seventeen thousand, three hundred forty-five".