8643360989 has 4 divisors (see below), whose sum is σ = 8643851580. Its totient is φ = 8642870400.

The previous prime is 8643360977. The next prime is 8643361019. The reversal of 8643360989 is 9890633468.

8643360989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2250079225 + 6393281764 = 47435^2 + 79958^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8643360989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8643360289) 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, 217844 + ... + 254445.

It is an arithmetic number, because the mean of its divisors is an integer number (2160962895).

Almost surely, 2^8643360989 is an apocalyptic number.

It is an amenable number.

8643360989 is a deficient number, since it is larger than the sum of its proper divisors (490591).

8643360989 is a wasteful number, since it uses less digits than its factorization.

8643360989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490590.

The product of its (nonzero) digits is 6718464, while the sum is 56.

The square root of 8643360989 is about 92969.6777933537. The cubic root of 8643360989 is about 2052.2371760713.

The spelling of 8643360989 in words is "eight billion, six hundred forty-three million, three hundred sixty thousand, nine hundred eighty-nine".