9868889 has 2 divisors, whose sum is σ = 9868890. Its totient is φ = 9868888.

The previous prime is 9868867. The next prime is 9868897. The reversal of 9868889 is 9888689.

9868889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9406489 + 462400 = 3067^2 + 680^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9868889 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (9868829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4934444 + 4934445.

It is an arithmetic number, because the mean of its divisors is an integer number (4934445).

Almost surely, 2^9868889 is an apocalyptic number.

It is an amenable number.

9868889 is a deficient number, since it is larger than the sum of its proper divisors (1).

9868889 is an equidigital number, since it uses as much as digits as its factorization.

9868889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1990656, while the sum is 56.

The square root of 9868889 is about 3141.4787919068. The cubic root of 9868889 is about 214.4977568170.

The spelling of 9868889 in words is "nine million, eight hundred sixty-eight thousand, eight hundred eighty-nine".