990987982 has 8 divisors (see below), whose sum is σ = 1551111696. Its totient is φ = 473950752.

The previous prime is 990987973. The next prime is 990987989. The reversal of 990987982 is 289789099.

990987982 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 990987982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990987989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10771563 + ... + 10771654.

It is an arithmetic number, because the mean of its divisors is an integer number (193888962).

Almost surely, 2^990987982 is an apocalyptic number.

990987982 is a deficient number, since it is larger than the sum of its proper divisors (560123714).

990987982 is a wasteful number, since it uses less digits than its factorization.

990987982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21543242.

The product of its (nonzero) digits is 5878656, while the sum is 61.

The square root of 990987982 is about 31479.9615946399. The cubic root of 990987982 is about 996.9869244942.

The spelling of 990987982 in words is "nine hundred ninety million, nine hundred eighty-seven thousand, nine hundred eighty-two".