2538209 has 4 divisors (see below), whose sum is σ = 2544660. Its totient is φ = 2531760.

The previous prime is 2538203. The next prime is 2538241. The reversal of 2538209 is 9028352.

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 1030225 + 1507984 = 1015^2 + 1228^2 .

It is a cyclic number.

It is not a de Polignac number, because 2538209 - 2²⁰ = 1489633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2538203) 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, 2594 + ... + 3435.

It is an arithmetic number, because the mean of its divisors is an integer number (636165).

2^2538209 is an apocalyptic number.

It is an amenable number.

2538209 is a deficient number, since it is larger than the sum of its proper divisors (6451).

2538209 is an equidigital number, since it uses as much as digits as its factorization.

2538209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6450.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 2538209 is about 1593.1757592934. The cubic root of 2538209 is about 136.4088224529.

The spelling of 2538209 in words is "two million, five hundred thirty-eight thousand, two hundred nine".