4609209 has 16 divisors (see below), whose sum is σ = 6747840. Its totient is φ = 2775360.

The previous prime is 4609207. The next prime is 4609217. The reversal of 4609209 is 9029064.

It is not a de Polignac number, because 4609209 - 2¹ = 4609207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4609207) 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 15 ways as a sum of consecutive naturals, for example, 6147 + ... + 6855.

It is an arithmetic number, because the mean of its divisors is an integer number (421740).

Almost surely, 2^4609209 is an apocalyptic number.

It is an amenable number.

4609209 is a deficient number, since it is larger than the sum of its proper divisors (2138631).

4609209 is a wasteful number, since it uses less digits than its factorization.

4609209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 4609209 is about 2146.9068447420. The cubic root of 4609209 is about 166.4212579358.

It can be divided in two parts, 460 and 9209, that added together give a palindrome (9669).

The spelling of 4609209 in words is "four million, six hundred nine thousand, two hundred nine".