99111800 has 24 divisors (see below), whose sum is σ = 230435400. Its totient is φ = 39644640.

The previous prime is 99111797. The next prime is 99111823. The reversal of 99111800 is 811199.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 247580 + ... + 247979.

It is an arithmetic number, because the mean of its divisors is an integer number (9601475).

Almost surely, 2^99111800 is an apocalyptic number.

It is an amenable number.

99111800 is an abundant number, since it is smaller than the sum of its proper divisors (131323600).

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

99111800 is a wasteful number, since it uses less digits than its factorization.

99111800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495575 (or 495566 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 29.

The square root of 99111800 is about 9955.4909472110. The cubic root of 99111800 is about 462.7805748247.

Adding to 99111800 its reverse (811199), we get a palindrome (99922999).

It can be divided in two parts, 9911 and 1800, that added together give a palindrome (11711).

The spelling of 99111800 in words is "ninety-nine million, one hundred eleven thousand, eight hundred".