8238752993 has 4 divisors (see below), whose sum is σ = 8723385540. Its totient is φ = 7754120448.

The previous prime is 8238752947. The next prime is 8238753007. The reversal of 8238752993 is 3992578328.

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 2189491264 + 6049261729 = 46792^2 + 77777^2 .

It is a cyclic number.

It is not a de Polignac number, because 8238752993 - 2¹⁸ = 8238490849 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8238752693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242316248 + ... + 242316281.

It is an arithmetic number, because the mean of its divisors is an integer number (2180846385).

Almost surely, 2^8238752993 is an apocalyptic number.

It is an amenable number.

8238752993 is a deficient number, since it is larger than the sum of its proper divisors (484632547).

8238752993 is a wasteful number, since it uses less digits than its factorization.

8238752993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484632546.

The product of its digits is 6531840, while the sum is 56.

The square root of 8238752993 is about 90767.5767716645. The cubic root of 8238752993 is about 2019.7013734445.

The spelling of 8238752993 in words is "eight billion, two hundred thirty-eight million, seven hundred fifty-two thousand, nine hundred ninety-three".