538209 has 12 divisors (see below), whose sum is σ = 888576. Its totient is φ = 307512.

The previous prime is 538201. The next prime is 538247. The reversal of 538209 is 902835.

It is not a de Polignac number, because 538209 - 2³ = 538201 is a prime.

538209 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (538201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4209 + ... + 4334.

It is an arithmetic number, because the mean of its divisors is an integer number (74048).

2⁵³⁸²⁰⁹ is an apocalyptic number.

It is an amenable number.

538209 is a deficient number, since it is larger than the sum of its proper divisors (350367).

538209 is a wasteful number, since it uses less digits than its factorization.

538209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8556 (or 8553 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 538209 is about 733.6272895688. The cubic root of 538209 is about 81.3424005986.

It can be divided in two parts, 538 and 209, that added together give a palindrome (747).

The spelling of 538209 in words is "five hundred thirty-eight thousand, two hundred nine".