9864989 has 2 divisors, whose sum is σ = 9864990. Its totient is φ = 9864988.

The previous prime is 9864983. The next prime is 9865007. The reversal of 9864989 is 9894689.

9864989 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., 6916900 + 2948089 = 2630^2 + 1717^2 .

It is a cyclic number.

It is not a de Polignac number, because 9864989 - 2⁸ = 9864733 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 9864989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9864983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4932494 + 4932495.

It is an arithmetic number, because the mean of its divisors is an integer number (4932495).

Almost surely, 2^9864989 is an apocalyptic number.

It is an amenable number.

9864989 is a deficient number, since it is larger than the sum of its proper divisors (1).

9864989 is an equidigital number, since it uses as much as digits as its factorization.

9864989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1119744, while the sum is 53.

The square root of 9864989 is about 3140.8580037945. The cubic root of 9864989 is about 214.4694979295.

The spelling of 9864989 in words is "nine million, eight hundred sixty-four thousand, nine hundred eighty-nine".