989980009 has 16 divisors (see below), whose sum is σ = 1082920960. Its totient is φ = 901530000.

The previous prime is 989980003. The next prime is 989980021. The reversal of 989980009 is 900089989.

989980009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-989980009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (989980003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83374 + ... + 94504.

It is an arithmetic number, because the mean of its divisors is an integer number (67682560).

Almost surely, 2^989980009 is an apocalyptic number.

It is an amenable number.

989980009 is a deficient number, since it is larger than the sum of its proper divisors (92940951).

989980009 is a wasteful number, since it uses less digits than its factorization.

989980009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11332.

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

The square root of 989980009 is about 31463.9477656571. The cubic root of 989980009 is about 996.6487849028.

The spelling of 989980009 in words is "nine hundred eighty-nine million, nine hundred eighty thousand, nine".