990994 has 8 divisors (see below), whose sum is σ = 1514700. Its totient is φ = 486096.

The previous prime is 990989. The next prime is 991009. The reversal of 990994 is 499099.

It can be written as a sum of positive squares in 2 ways, for example, as 893025 + 97969 = 945^2 + 313^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 990994.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4569 + ... + 4780.

2⁹⁹⁰⁹⁹⁴ is an apocalyptic number.

990994 is a deficient number, since it is larger than the sum of its proper divisors (523706).

990994 is a wasteful number, since it uses less digits than its factorization.

990994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9404.

The product of its (nonzero) digits is 26244, while the sum is 40.

The square root of 990994 is about 995.4868155832. The cubic root of 990994 is about 99.6988942633.

The spelling of 990994 in words is "nine hundred ninety thousand, nine hundred ninety-four".