990109002 has 32 divisors (see below), whose sum is σ = 2098680192. Its totient is φ = 310329344.

The previous prime is 990108997. The next prime is 990109007. The reversal of 990109002 is 200901099.

It is an interprime number because it is at equal distance from previous prime (990108997) and next prime (990109007).

It is not an unprimeable number, because it can be changed into a prime (990109007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120778 + ... + 128714.

It is an arithmetic number, because the mean of its divisors is an integer number (65583756).

Almost surely, 2^990109002 is an apocalyptic number.

990109002 is an abundant number, since it is smaller than the sum of its proper divisors (1108571190).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

990109002 is a wasteful number, since it uses less digits than its factorization.

990109002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9182.

The product of its (nonzero) digits is 1458, while the sum is 30.

The square root of 990109002 is about 31465.9975529142. The cubic root of 990109002 is about 996.6920703336.

The spelling of 990109002 in words is "nine hundred ninety million, one hundred nine thousand, two".