99081111 has 4 divisors (see below), whose sum is σ = 132108152. Its totient is φ = 66054072.

The previous prime is 99081107. The next prime is 99081113. The reversal of 99081111 is 11118099.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 99081111 - 2² = 99081107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99081113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16513516 + ... + 16513521.

It is an arithmetic number, because the mean of its divisors is an integer number (33027038).

Almost surely, 2^99081111 is an apocalyptic number.

99081111 is a deficient number, since it is larger than the sum of its proper divisors (33027041).

99081111 is a wasteful number, since it uses less digits than its factorization.

99081111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33027040.

The product of its (nonzero) digits is 648, while the sum is 30.

The square root of 99081111 is about 9953.9495176538. The cubic root of 99081111 is about 462.7328047335.

The spelling of 99081111 in words is "ninety-nine million, eighty-one thousand, one hundred eleven".