9840989 has 2 divisors, whose sum is σ = 9840990. Its totient is φ = 9840988.

The previous prime is 9840983. The next prime is 9841019. The reversal of 9840989 is 9890489.

9840989 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., 8702500 + 1138489 = 2950^2 + 1067^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9840989 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9840983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4920494 + 4920495.

It is an arithmetic number, because the mean of its divisors is an integer number (4920495).

Almost surely, 2^9840989 is an apocalyptic number.

It is an amenable number.

9840989 is a deficient number, since it is larger than the sum of its proper divisors (1).

9840989 is an equidigital number, since it uses as much as digits as its factorization.

9840989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 9840989 is about 3137.0350651531. The cubic root of 9840989 is about 214.2954329349.

The spelling of 9840989 in words is "nine million, eight hundred forty thousand, nine hundred eighty-nine".