999000873 has 12 divisors (see below), whose sum is σ = 1554001540. Its totient is φ = 614769696.

The previous prime is 999000841. The next prime is 999000901. The reversal of 999000873 is 378000999.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 616876569 + 382124304 = 24837^2 + 19548^2 .

It is not a de Polignac number, because 999000873 - 2⁵ = 999000841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (999000073) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4269118 + ... + 4269351.

Almost surely, 2^999000873 is an apocalyptic number.

It is an amenable number.

999000873 is a deficient number, since it is larger than the sum of its proper divisors (555000667).

999000873 is a wasteful number, since it uses less digits than its factorization.

999000873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8538488 (or 8538485 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 999000873 is about 31606.9750688040. The cubic root of 999000873 is about 999.6668466879. Note that the first 3 decimals are identical.

The spelling of 999000873 in words is "nine hundred ninety-nine million, eight hundred seventy-three", and thus it is an aban number.