990108911 has 4 divisors (see below), whose sum is σ = 1080118824. Its totient is φ = 900099000.

The previous prime is 990108893. The next prime is 990108919. The reversal of 990108911 is 119801099.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 990108911 - 2²⁶ = 923000047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990108919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45004940 + ... + 45004961.

It is an arithmetic number, because the mean of its divisors is an integer number (270029706).

Almost surely, 2^990108911 is an apocalyptic number.

990108911 is a deficient number, since it is larger than the sum of its proper divisors (90009913).

990108911 is a wasteful number, since it uses less digits than its factorization.

990108911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90009912.

The product of its (nonzero) digits is 5832, while the sum is 38.

The square root of 990108911 is about 31465.9961069088. The cubic root of 990108911 is about 996.6920397985.

It can be divided in two parts, 990 and 108911, that added together give a palindrome (109901).

The spelling of 990108911 in words is "nine hundred ninety million, one hundred eight thousand, nine hundred eleven".