2099189 has 4 divisors (see below), whose sum is σ = 2102124. Its totient is φ = 2096256.

The previous prime is 2099179. The next prime is 2099191. The reversal of 2099189 is 9819902.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1844164 + 255025 = 1358^2 + 505^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2099189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2099129) 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, 389 + ... + 2085.

It is an arithmetic number, because the mean of its divisors is an integer number (525531).

2^2099189 is an apocalyptic number.

It is an amenable number.

2099189 is a deficient number, since it is larger than the sum of its proper divisors (2935).

2099189 is a wasteful number, since it uses less digits than its factorization.

2099189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2934.

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 2099189 is about 1448.8578260133. The cubic root of 2099189 is about 128.0414294603.

The spelling of 2099189 in words is "two million, ninety-nine thousand, one hundred eighty-nine".