8687664189 has 12 divisors (see below), whose sum is σ = 12572050972. Its totient is φ = 5781067200.

The previous prime is 8687664163. The next prime is 8687664191. The reversal of 8687664189 is 9814667868.

8687664189 is a `hidden beast` number, since 86 + 87 + 66 + 418 + 9 = 666.

8687664189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 4085127225 + 4602536964 = 63915^2 + 67842^2 .

It is not a de Polignac number, because 8687664189 - 2¹¹ = 8687662141 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 (8687664109) 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 11 ways as a sum of consecutive naturals, for example, 887272 + ... + 897009.

Almost surely, 2^8687664189 is an apocalyptic number.

It is an amenable number.

8687664189 is a deficient number, since it is larger than the sum of its proper divisors (3884386783).

8687664189 is a wasteful number, since it uses less digits than its factorization.

8687664189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1784828 (or 1784825 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 63.

The square root of 8687664189 is about 93207.6401857702. The cubic root of 8687664189 is about 2055.7375802643.

The spelling of 8687664189 in words is "eight billion, six hundred eighty-seven million, six hundred sixty-four thousand, one hundred eighty-nine".