2116189 has 4 divisors (see below), whose sum is σ = 2125660. Its totient is φ = 2106720.

The previous prime is 2116187. The next prime is 2116199. The reversal of 2116189 is 9816112.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2044900 + 71289 = 1430^2 + 267^2 .

It is a cyclic number.

It is not a de Polignac number, because 2116189 - 2¹ = 2116187 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2116183) 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, 4392 + ... + 4849.

It is an arithmetic number, because the mean of its divisors is an integer number (531415).

2^2116189 is an apocalyptic number.

It is an amenable number.

2116189 is a deficient number, since it is larger than the sum of its proper divisors (9471).

2116189 is an equidigital number, since it uses as much as digits as its factorization.

2116189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9470.

The product of its digits is 864, while the sum is 28.

The square root of 2116189 is about 1454.7126864092. The cubic root of 2116189 is about 128.3861426931.

It can be divided in two parts, 211 and 6189, that added together give a square (6400 = 80²).

The spelling of 2116189 in words is "two million, one hundred sixteen thousand, one hundred eighty-nine".