991100010 has 32 divisors (see below), whose sum is σ = 2380352832. Its totient is φ = 264103040.

The previous prime is 991099973. The next prime is 991100081. The reversal of 991100010 is 10001199.

It is a self number, because there is not a number n which added to its sum of digits gives 991100010.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33277 + ... + 55583.

It is an arithmetic number, because the mean of its divisors is an integer number (74386026).

Almost surely, 2^991100010 is an apocalyptic number.

991100010 is an abundant number, since it is smaller than the sum of its proper divisors (1389252822).

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

991100010 is a wasteful number, since it uses less digits than its factorization.

991100010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23798.

The product of its (nonzero) digits is 81, while the sum is 21.

The square root of 991100010 is about 31481.7408984954. The cubic root of 991100010 is about 997.0244917990.

The spelling of 991100010 in words is "nine hundred ninety-one million, one hundred thousand, ten".