99991116 has 18 divisors (see below), whose sum is σ = 252755412. Its totient is φ = 33330360.

The previous prime is 99991109. The next prime is 99991207. The reversal of 99991116 is 61119999.

It is a tau number, because it is divible by the number of its divisors (18).

It is a nude number because it is divisible by every one of its digits.

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 5 ways as a sum of consecutive naturals, for example, 1388730 + ... + 1388801.

Almost surely, 2^99991116 is an apocalyptic number.

It is an amenable number.

99991116 is an abundant number, since it is smaller than the sum of its proper divisors (152764296).

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

99991116 is a wasteful number, since it uses less digits than its factorization.

99991116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2777541 (or 2777536 counting only the distinct ones).

The product of its digits is 39366, while the sum is 45.

The square root of 99991116 is about 9999.5557901339. Note that the first 3 decimals coincide. The cubic root of 99991116 is about 464.1451376625.

The spelling of 99991116 in words is "ninety-nine million, nine hundred ninety-one thousand, one hundred sixteen".