2108109 has 8 divisors (see below), whose sum is σ = 2822272. Its totient is φ = 1399680.

The previous prime is 2108089. The next prime is 2108123. The reversal of 2108109 is 9018012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2108109 - 2⁵ = 2108077 is a prime.

It is a Duffinian number.

2108109 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2108159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 484 + ... + 2109.

It is an arithmetic number, because the mean of its divisors is an integer number (352784).

2^2108109 is an apocalyptic number.

It is an amenable number.

2108109 is a deficient number, since it is larger than the sum of its proper divisors (714163).

2108109 is a wasteful number, since it uses less digits than its factorization.

2108109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2867.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 2108109 is about 1451.9328496869. The cubic root of 2108109 is about 128.2225336270. Note that the first 3 decimals are identical.

Subtracting 2108109 from its reverse (9018012), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 2108109 in words is "two million, one hundred eight thousand, one hundred nine".