538509 has 8 divisors (see below), whose sum is σ = 760320. Its totient is φ = 337856.

The previous prime is 538487. The next prime is 538511. The reversal of 538509 is 905835.

538509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 538509 - 2¹¹ = 536461 is a prime.

It is an Ulam number.

538509 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5229 + ... + 5330.

It is an arithmetic number, because the mean of its divisors is an integer number (95040).

2⁵³⁸⁵⁰⁹ is an apocalyptic number.

It is an amenable number.

538509 is a deficient number, since it is larger than the sum of its proper divisors (221811).

538509 is a wasteful number, since it uses less digits than its factorization.

538509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10579.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 538509 is about 733.8317245800. The cubic root of 538509 is about 81.3575113254.

The spelling of 538509 in words is "five hundred thirty-eight thousand, five hundred nine".