99198 has 32 divisors (see below), whose sum is σ = 241920. Its totient is φ = 29880.

The previous prime is 99191. The next prime is 99223. The reversal of 99198 is 89199.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 99198.

It is not an unprimeable number, because it can be changed into a prime (99191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 511 + ... + 677.

It is an arithmetic number, because the mean of its divisors is an integer number (7560).

2⁹⁹¹⁹⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99198, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120960).

99198 is an abundant number, since it is smaller than the sum of its proper divisors (142722).

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

99198 is a wasteful number, since it uses less digits than its factorization.

99198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189 (or 183 counting only the distinct ones).

The product of its digits is 5832, while the sum is 36.

The square root of 99198 is about 314.9571399413. The cubic root of 99198 is about 46.2914699877.

Multiplying 99198 by its sum of digits (36), we get a triangular number (3571128 = T₂₆₇₂).

Subtracting from 99198 its reverse (89199), we obtain a palindrome (9999).

It can be divided in two parts, 991 and 98, that added together give a square (1089 = 33²).

The spelling of 99198 in words is "ninety-nine thousand, one hundred ninety-eight".