990995559 has 8 divisors (see below), whose sum is σ = 1390871040. Its totient is φ = 625891896.

The previous prime is 990995557. The next prime is 990995581. The reversal of 990995559 is 955599099.

990995559 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 not a de Polignac number, because 990995559 - 2¹ = 990995557 is a prime.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990995557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8692887 + ... + 8693000.

It is an arithmetic number, because the mean of its divisors is an integer number (173858880).

Almost surely, 2^990995559 is an apocalyptic number.

990995559 is a deficient number, since it is larger than the sum of its proper divisors (399875481).

990995559 is a wasteful number, since it uses less digits than its factorization.

990995559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17385909.

The product of its (nonzero) digits is 7381125, while the sum is 60.

The square root of 990995559 is about 31480.0819408082. The cubic root of 990995559 is about 996.9894654435.

The spelling of 990995559 in words is "nine hundred ninety million, nine hundred ninety-five thousand, five hundred fifty-nine".