990194 has 8 divisors (see below), whose sum is σ = 1525548. Its totient is φ = 481680.

The previous prime is 990181. The next prime is 990211. The reversal of 990194 is 491099.

It can be written as a sum of positive squares in 2 ways, for example, as 990025 + 169 = 995^2 + 13^2 .

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

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 990194.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 990194.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6617 + ... + 6764.

2⁹⁹⁰¹⁹⁴ is an apocalyptic number.

990194 is a deficient number, since it is larger than the sum of its proper divisors (535354).

990194 is a wasteful number, since it uses less digits than its factorization.

990194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13420.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 990194 is about 995.0849209992. The cubic root of 990194 is about 99.6720590563.

The spelling of 990194 in words is "nine hundred ninety thousand, one hundred ninety-four".