99991108 has 12 divisors (see below), whose sum is σ = 199982272. Its totient is φ = 42853320.

The previous prime is 99991103. The next prime is 99991109. The reversal of 99991108 is 80119999.

99991108 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (99991103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1785528 + ... + 1785583.

Almost surely, 2^99991108 is an apocalyptic number.

It is an amenable number.

99991108 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

99991108 is a wasteful number, since it uses less digits than its factorization.

99991108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3571122 (or 3571120 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 46.

The square root of 99991108 is about 9999.5553901161. Note that the first 3 decimals coincide. The cubic root of 99991108 is about 464.1451252842.

The spelling of 99991108 in words is "ninety-nine million, nine hundred ninety-one thousand, one hundred eight".