2173109 has 4 divisors (see below), whose sum is σ = 2267616. Its totient is φ = 2078604.

The previous prime is 2173099. The next prime is 2173111. The reversal of 2173109 is 9013712.

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 2173109 - 2⁸ = 2172853 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 94483 = 2173109 / (2 + 1 + 7 + 3 + 1 + 0 + 9).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2173009) 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, 47219 + ... + 47264.

It is an arithmetic number, because the mean of its divisors is an integer number (566904).

2^2173109 is an apocalyptic number.

It is an amenable number.

2173109 is a deficient number, since it is larger than the sum of its proper divisors (94507).

2173109 is an equidigital number, since it uses as much as digits as its factorization.

2173109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94506.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 2173109 is about 1474.1468719229. The cubic root of 2173109 is about 129.5270586412.

The spelling of 2173109 in words is "two million, one hundred seventy-three thousand, one hundred nine".