999987104 has 24 divisors (see below), whose sum is σ = 1969641828. Its totient is φ = 499760640.

The previous prime is 999987103. The next prime is 999987137. The reversal of 999987104 is 401789999.

It can be written as a sum of positive squares in 2 ways, for example, as 964226704 + 35760400 = 31052^2 + 5980^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 999987104.

It is not an unprimeable number, because it can be changed into a prime (999987101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77774 + ... + 89714.

Almost surely, 2^999987104 is an apocalyptic number.

It is an amenable number.

999987104 is a deficient number, since it is larger than the sum of its proper divisors (969654724).

999987104 is a wasteful number, since it uses less digits than its factorization.

999987104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14568 (or 14560 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 56.

The square root of 999987104 is about 31622.5726973629. The cubic root of 999987104 is about 999.9957013149.

The spelling of 999987104 in words is "nine hundred ninety-nine million, nine hundred eighty-seven thousand, one hundred four".