991100002 has 8 divisors (see below), whose sum is σ = 1564894800. Its totient is φ = 469468404.

The previous prime is 991099973. The next prime is 991100081. The reversal of 991100002 is 200001199.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13040752 + ... + 13040827.

It is an arithmetic number, because the mean of its divisors is an integer number (195611850).

Almost surely, 2^991100002 is an apocalyptic number.

991100002 is a deficient number, since it is larger than the sum of its proper divisors (573794798).

991100002 is a wasteful number, since it uses less digits than its factorization.

991100002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26081600.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 991100002 is about 31481.7407714377. The cubic root of 991100002 is about 997.0244891164.

The spelling of 991100002 in words is "nine hundred ninety-one million, one hundred thousand, two".