538009 has 4 divisors (see below), whose sum is σ = 549504. Its totient is φ = 526516.

The previous prime is 538001. The next prime is 538019. The reversal of 538009 is 900835.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 538009 - 2³ = 538001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (538001) 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, 5677 + ... + 5770.

It is an arithmetic number, because the mean of its divisors is an integer number (137376).

2⁵³⁸⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

538009 is a deficient number, since it is larger than the sum of its proper divisors (11495).

538009 is a wasteful number, since it uses less digits than its factorization.

538009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11494.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 538009 is about 733.4909679062. The cubic root of 538009 is about 81.3323236609.

The spelling of 538009 in words is "five hundred thirty-eight thousand, nine".