9987149684 has 12 divisors (see below), whose sum is σ = 17540609604. Its totient is φ = 4975546944.

The previous prime is 9987149663. The next prime is 9987149699. The reversal of 9987149684 is 4869417899.

It can be written as a sum of positive squares in 2 ways, for example, as 1077677584 + 8909472100 = 32828^2 + 94390^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 9987149684.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4505729 + ... + 4507944.

It is an arithmetic number, because the mean of its divisors is an integer number (1461717467).

Almost surely, 2^9987149684 is an apocalyptic number.

It is an amenable number.

9987149684 is a deficient number, since it is larger than the sum of its proper divisors (7553459920).

9987149684 is a wasteful number, since it uses less digits than its factorization.

9987149684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9013954 (or 9013952 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 65.

The square root of 9987149684 is about 99935.7277653993. The cubic root of 9987149684 is about 2153.5114555715.

The spelling of 9987149684 in words is "nine billion, nine hundred eighty-seven million, one hundred forty-nine thousand, six hundred eighty-four".