990984194 has 4 divisors (see below), whose sum is σ = 1486476294. Its totient is φ = 495492096.

The previous prime is 990984191. The next prime is 990984217. The reversal of 990984194 is 491489099.

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., 890724025 + 100260169 = 29845^2 + 10013^2 .

It is not an unprimeable number, because it can be changed into a prime (990984191) by changing a digit.

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 as a sum of consecutive naturals, namely, 247746047 + ... + 247746050.

Almost surely, 2^990984194 is an apocalyptic number.

990984194 is a deficient number, since it is larger than the sum of its proper divisors (495492100).

990984194 is a wasteful number, since it uses less digits than its factorization.

990984194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495492099.

The product of its (nonzero) digits is 839808, while the sum is 53.

The square root of 990984194 is about 31479.9014293247. The cubic root of 990984194 is about 996.9856541824.

The spelling of 990984194 in words is "nine hundred ninety million, nine hundred eighty-four thousand, one hundred ninety-four".