2090209 has 16 divisors (see below), whose sum is σ = 2450880. Its totient is φ = 1762560.

The previous prime is 2090203. The next prime is 2090213. The reversal of 2090209 is 9020902.

It is a cyclic number.

It is not a de Polignac number, because 2090209 - 2⁵ = 2090177 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2090209.

It is not an unprimeable number, because it can be changed into a prime (2090203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15189 + ... + 15325.

It is an arithmetic number, because the mean of its divisors is an integer number (153180).

2^2090209 is an apocalyptic number.

It is an amenable number.

2090209 is a deficient number, since it is larger than the sum of its proper divisors (360671).

2090209 is a wasteful number, since it uses less digits than its factorization.

2090209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 2090209 is about 1445.7555118346. The cubic root of 2090209 is about 127.8585881319.

Adding to 2090209 its reverse (9020902), we get a palindrome (11111111).

The spelling of 2090209 in words is "two million, ninety thousand, two hundred nine".