990874 has 4 divisors (see below), whose sum is σ = 1486314. Its totient is φ = 495436.

The previous prime is 990851. The next prime is 990881. The reversal of 990874 is 478099.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 680625 + 310249 = 825^2 + 557^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247717 + ... + 247720.

2⁹⁹⁰⁸⁷⁴ is an apocalyptic number.

990874 is a deficient number, since it is larger than the sum of its proper divisors (495440).

990874 is a wasteful number, since it uses less digits than its factorization.

990874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495439.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 990874 is about 995.4265417398. The cubic root of 990874 is about 99.6948699032.

The spelling of 990874 in words is "nine hundred ninety thousand, eight hundred seventy-four".