9864889 has 2 divisors, whose sum is σ = 9864890. Its totient is φ = 9864888.

The previous prime is 9864847. The next prime is 9864937. The reversal of 9864889 is 9884689.

9864889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9504889 + 360000 = 3083^2 + 600^2 .

It is an emirp because it is prime and its reverse (9884689) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9864889 - 2⁷ = 9864761 is a prime.

It is not a weakly prime, because it can be changed into another prime (9864839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4932444 + 4932445.

It is an arithmetic number, because the mean of its divisors is an integer number (4932445).

Almost surely, 2^9864889 is an apocalyptic number.

It is an amenable number.

9864889 is a deficient number, since it is larger than the sum of its proper divisors (1).

9864889 is an equidigital number, since it uses as much as digits as its factorization.

9864889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 995328, while the sum is 52.

The square root of 9864889 is about 3140.8420845372. The cubic root of 9864889 is about 214.4687732447.

The spelling of 9864889 in words is "nine million, eight hundred sixty-four thousand, eight hundred eighty-nine".