2289209 has 8 divisors (see below), whose sum is σ = 2477832. Its totient is φ = 2102400.

The previous prime is 2289197. The next prime is 2289211. The reversal of 2289209 is 9029822.

It can be written as a sum of positive squares in 4 ways, for example, as 861184 + 1428025 = 928^2 + 1195^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2289209 - 2⁴ = 2289193 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2289239) 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, 3509 + ... + 4109.

It is an arithmetic number, because the mean of its divisors is an integer number (309729).

2^2289209 is an apocalyptic number.

It is an amenable number.

2289209 is a deficient number, since it is larger than the sum of its proper divisors (188623).

2289209 is a wasteful number, since it uses less digits than its factorization.

2289209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 2289209 is about 1513.0132187129. The cubic root of 2289209 is about 131.7938510060.

The spelling of 2289209 in words is "two million, two hundred eighty-nine thousand, two hundred nine".