2209489 has 4 divisors (see below), whose sum is σ = 2229156. Its totient is φ = 2189824.

The previous prime is 2209483. The next prime is 2209499. The reversal of 2209489 is 9849022.

2209489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 810000 + 1399489 = 900^2 + 1183^2 .

It is a cyclic number.

It is not a de Polignac number, because 2209489 - 2⁵ = 2209457 is a prime.

It is a super-2 number, since 2×2209489² = 9763683282242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2209483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9664 + ... + 9889.

It is an arithmetic number, because the mean of its divisors is an integer number (557289).

2^2209489 is an apocalyptic number.

It is an amenable number.

2209489 is a deficient number, since it is larger than the sum of its proper divisors (19667).

2209489 is a wasteful number, since it uses less digits than its factorization.

2209489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19666.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 2209489 is about 1486.4349968969. The cubic root of 2209489 is about 130.2458660669.

The spelling of 2209489 in words is "two million, two hundred nine thousand, four hundred eighty-nine".