9868644089 has 2 divisors, whose sum is σ = 9868644090. Its totient is φ = 9868644088.

The previous prime is 9868644031. The next prime is 9868644119. The reversal of 9868644089 is 9804468689.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9828739600 + 39904489 = 99140^2 + 6317^2 .

It is an emirp because it is prime and its reverse (9804468689) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9868644089 - 2²⁴ = 9851866873 is a prime.

It is not a weakly prime, because it can be changed into another prime (9868644389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4934322044 + 4934322045.

It is an arithmetic number, because the mean of its divisors is an integer number (4934322045).

Almost surely, 2^9868644089 is an apocalyptic number.

It is an amenable number.

9868644089 is a deficient number, since it is larger than the sum of its proper divisors (1).

9868644089 is an equidigital number, since it uses as much as digits as its factorization.

9868644089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23887872, while the sum is 62.

The square root of 9868644089 is about 99341.0493653052. The cubic root of 9868644089 is about 2144.9598244314.

The spelling of 9868644089 in words is "nine billion, eight hundred sixty-eight million, six hundred forty-four thousand, eighty-nine".