8643704993 has 16 divisors (see below), whose sum is σ = 11039414400. Its totient is φ = 6571075200.

The previous prime is 8643704981. The next prime is 8643705001. The reversal of 8643704993 is 3994073468.

It is a cyclic number.

It is not a de Polignac number, because 8643704993 - 2¹⁴ = 8643688609 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8643704093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1365818 + ... + 1372131.

It is an arithmetic number, because the mean of its divisors is an integer number (689963400).

Almost surely, 2^8643704993 is an apocalyptic number.

It is an amenable number.

8643704993 is a deficient number, since it is larger than the sum of its proper divisors (2395709407).

8643704993 is a wasteful number, since it uses less digits than its factorization.

8643704993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2738008.

The product of its (nonzero) digits is 3919104, while the sum is 53.

The square root of 8643704993 is about 92971.5278620288. The cubic root of 8643704993 is about 2052.2644019168.

The spelling of 8643704993 in words is "eight billion, six hundred forty-three million, seven hundred four thousand, nine hundred ninety-three".