2209809 has 8 divisors (see below), whose sum is σ = 3367360. Its totient is φ = 1262736.

The previous prime is 2209793. The next prime is 2209811. The reversal of 2209809 is 9089022.

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

It is not a de Polignac number, because 2209809 - 2⁴ = 2209793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2209849) 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, 52594 + ... + 52635.

It is an arithmetic number, because the mean of its divisors is an integer number (420920).

2^2209809 is an apocalyptic number.

It is an amenable number.

2209809 is a deficient number, since it is larger than the sum of its proper divisors (1157551).

2209809 is a wasteful number, since it uses less digits than its factorization.

2209809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105239.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 2209809 is about 1486.5426330920. The cubic root of 2209809 is about 130.2521535938.

The spelling of 2209809 in words is "two million, two hundred nine thousand, eight hundred nine".