990873 has 20 divisors (see below), whose sum is σ = 1595748. Its totient is φ = 609120.

The previous prime is 990851. The next prime is 990881. The reversal of 990873 is 378099.

It can be written as a sum of positive squares in 2 ways, for example, as 363609 + 627264 = 603^2 + 792^2 .

It is not a de Polignac number, because 990873 - 2⁵ = 990841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (990893) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 583 + ... + 1523.

2⁹⁹⁰⁸⁷³ is an apocalyptic number.

It is an amenable number.

990873 is a deficient number, since it is larger than the sum of its proper divisors (604875).

990873 is a wasteful number, since it uses less digits than its factorization.

990873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966 (or 957 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 990873 is about 995.4260394424. The cubic root of 990873 is about 99.6948363655.

The spelling of 990873 in words is "nine hundred ninety thousand, eight hundred seventy-three".