99189 has 12 divisors (see below), whose sum is σ = 146016. Its totient is φ = 64872.

The previous prime is 99181. The next prime is 99191. The reversal of 99189 is 98199.

It is not a de Polignac number, because 99189 - 2³ = 99181 is a prime.

Its product of digits (5832) is a multiple of the sum of its prime factors (216).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99181) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 874 + ... + 980.

It is an arithmetic number, because the mean of its divisors is an integer number (12168).

2⁹⁹¹⁸⁹ is an apocalyptic number.

It is an amenable number.

99189 is a deficient number, since it is larger than the sum of its proper divisors (46827).

99189 is a wasteful number, since it uses less digits than its factorization.

99189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216 (or 213 counting only the distinct ones).

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

The square root of 99189 is about 314.9428519589. The cubic root of 99189 is about 46.2900699735.

Adding to 99189 its sum of digits (36), we get a square (99225 = 315²).

Subtracting from 99189 its reverse (98199), we obtain a triangular number (990 = T₄₄).

The spelling of 99189 in words is "ninety-nine thousand, one hundred eighty-nine".