9980989 has 4 divisors (see below), whose sum is σ = 10568124. Its totient is φ = 9393856.

The previous prime is 9980987. The next prime is 9981001. The reversal of 9980989 is 9890899.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9272025 + 708964 = 3045^2 + 842^2 .

It is a cyclic number.

It is not a de Polignac number, because 9980989 - 2¹ = 9980987 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 (9980987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 293542 + ... + 293575.

It is an arithmetic number, because the mean of its divisors is an integer number (2642031).

Almost surely, 2^9980989 is an apocalyptic number.

It is an amenable number.

9980989 is a deficient number, since it is larger than the sum of its proper divisors (587135).

9980989 is a wasteful number, since it uses less digits than its factorization.

9980989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587134.

The product of its (nonzero) digits is 419904, while the sum is 52.

The square root of 9980989 is about 3159.2703271483. The cubic root of 9980989 is about 215.3068558685.

The spelling of 9980989 in words is "nine million, nine hundred eighty thousand, nine hundred eighty-nine".