2091109 has 4 divisors (see below), whose sum is σ = 2095200. Its totient is φ = 2087020.

The previous prime is 2091097. The next prime is 2091139. The reversal of 2091109 is 9011902.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2091109 - 2⁹ = 2090597 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2091109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1147 + ... + 2344.

It is an arithmetic number, because the mean of its divisors is an integer number (523800).

2^2091109 is an apocalyptic number.

It is an amenable number.

2091109 is a deficient number, since it is larger than the sum of its proper divisors (4091).

2091109 is an equidigital number, since it uses as much as digits as its factorization.

2091109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4090.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 2091109 is about 1446.0667342830. The cubic root of 2091109 is about 127.8769365709.

The spelling of 2091109 in words is "two million, ninety-one thousand, one hundred nine".