9987683994 has 32 divisors (see below), whose sum is σ = 22309875840. Its totient is φ = 3311974656.

The previous prime is 9987683989. The next prime is 9987684019. The reversal of 9987683994 is 4993867899.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 468742 + ... + 489585.

It is an arithmetic number, because the mean of its divisors is an integer number (697183620).

Almost surely, 2^9987683994 is an apocalyptic number.

9987683994 is an abundant number, since it is smaller than the sum of its proper divisors (12322191846).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9987683994 is a wasteful number, since it uses less digits than its factorization.

9987683994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958531 (or 958525 counting only the distinct ones).

The product of its digits is 211631616, while the sum is 72.

The square root of 9987683994 is about 99938.4009978146. The cubic root of 9987683994 is about 2153.5498589940.

The spelling of 9987683994 in words is "nine billion, nine hundred eighty-seven million, six hundred eighty-three thousand, nine hundred ninety-four".