99388111 has 4 divisors (see below), whose sum is σ = 99534312. Its totient is φ = 99241912.

The previous prime is 99388097. The next prime is 99388123. The reversal of 99388111 is 11188399.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 99388111 - 2⁷ = 99387983 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99388151) 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, 72076 + ... + 73441.

It is an arithmetic number, because the mean of its divisors is an integer number (24883578).

Almost surely, 2^99388111 is an apocalyptic number.

99388111 is a deficient number, since it is larger than the sum of its proper divisors (146201).

99388111 is a wasteful number, since it uses less digits than its factorization.

99388111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146200.

The product of its digits is 15552, while the sum is 40.

The square root of 99388111 is about 9969.3586052464. The cubic root of 99388111 is about 463.2102334441.

It can be divided in two parts, 99388 and 111, that added together give a palindrome (99499).

The spelling of 99388111 in words is "ninety-nine million, three hundred eighty-eight thousand, one hundred eleven".