9820989 has 6 divisors (see below), whose sum is σ = 14185886. Its totient is φ = 6547320.

The previous prime is 9820969. The next prime is 9820997. The reversal of 9820989 is 9890289.

9820989 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 8749764 + 1071225 = 2958^2 + 1035^2 .

It is not a de Polignac number, because 9820989 - 2⁵ = 9820957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9820969) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 545602 + ... + 545619.

Almost surely, 2^9820989 is an apocalyptic number.

It is an amenable number.

9820989 is a deficient number, since it is larger than the sum of its proper divisors (4364897).

9820989 is a wasteful number, since it uses less digits than its factorization.

9820989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091227 (or 1091224 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 9820989 is about 3133.8457205166. The cubic root of 9820989 is about 214.1501624618.

The spelling of 9820989 in words is "nine million, eight hundred twenty thousand, nine hundred eighty-nine".