2164109 has 4 divisors (see below), whose sum is σ = 2175516. Its totient is φ = 2152704.

The previous prime is 2164073. The next prime is 2164111. The reversal of 2164109 is 9014612.

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 265225 + 1898884 = 515^2 + 1378^2 .

It is a cyclic number.

It is not a de Polignac number, because 2164109 - 2¹⁶ = 2098573 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 (2164609) 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, 5414 + ... + 5799.

It is an arithmetic number, because the mean of its divisors is an integer number (543879).

2^2164109 is an apocalyptic number.

It is an amenable number.

2164109 is a deficient number, since it is larger than the sum of its proper divisors (11407).

2164109 is a wasteful number, since it uses less digits than its factorization.

2164109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11406.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 2164109 is about 1471.0910916731. The cubic root of 2164109 is about 129.3479977409.

The spelling of 2164109 in words is "two million, one hundred sixty-four thousand, one hundred nine".