9989768986 has 16 divisors (see below), whose sum is σ = 15638283648. Its totient is φ = 4777066800.

The previous prime is 9989768981. The next prime is 9989769043. The reversal of 9989768986 is 6898679899.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (9989768981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 646531 + ... + 661801.

It is an arithmetic number, because the mean of its divisors is an integer number (977392728).

Almost surely, 2^9989768986 is an apocalyptic number.

9989768986 is a deficient number, since it is larger than the sum of its proper divisors (5648514662).

9989768986 is a wasteful number, since it uses less digits than its factorization.

9989768986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29517.

The product of its digits is 846526464, while the sum is 79.

The square root of 9989768986 is about 99948.8318390965. The cubic root of 9989768986 is about 2153.6997042707.

The spelling of 9989768986 in words is "nine billion, nine hundred eighty-nine million, seven hundred sixty-eight thousand, nine hundred eighty-six".