538507 has 4 divisors (see below), whose sum is σ = 540400. Its totient is φ = 536616.

The previous prime is 538487. The next prime is 538511. The reversal of 538507 is 705835.

538507 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-538507 is a prime.

It is an Ulam number.

It is a Duffinian number.

538507 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (538567) 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, 423 + ... + 1120.

It is an arithmetic number, because the mean of its divisors is an integer number (135100).

2⁵³⁸⁵⁰⁷ is an apocalyptic number.

538507 is a deficient number, since it is larger than the sum of its proper divisors (1893).

538507 is a wasteful number, since it uses less digits than its factorization.

538507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1892.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 538507 is about 733.8303618685. The cubic root of 538507 is about 81.3574106058.

The spelling of 538507 in words is "five hundred thirty-eight thousand, five hundred seven".