2209209 has 4 divisors (see below), whose sum is σ = 2945616. Its totient is φ = 1472804.

The previous prime is 2209189. The next prime is 2209213. The reversal of 2209209 is 9029022.

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 2209209 - 2⁵ = 2209177 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (2209289) 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, 368199 + ... + 368204.

It is an arithmetic number, because the mean of its divisors is an integer number (736404).

2^2209209 is an apocalyptic number.

It is an amenable number.

2209209 is a deficient number, since it is larger than the sum of its proper divisors (736407).

2209209 is an equidigital number, since it uses as much as digits as its factorization.

2209209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736406.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 2209209 is about 1486.3408088322. The cubic root of 2209209 is about 130.2403639827.

The spelling of 2209209 in words is "two million, two hundred nine thousand, two hundred nine".