538687 has 4 divisors (see below), whose sum is σ = 556096. Its totient is φ = 521280.

The previous prime is 538651. The next prime is 538697. The reversal of 538687 is 786835.

538687 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 not a de Polignac number, because 538687 - 2¹⁵ = 505919 is a prime.

It is a Duffinian number.

538687 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538697) 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, 8658 + ... + 8719.

It is an arithmetic number, because the mean of its divisors is an integer number (139024).

2⁵³⁸⁶⁸⁷ is an apocalyptic number.

538687 is a deficient number, since it is larger than the sum of its proper divisors (17409).

538687 is a wasteful number, since it uses less digits than its factorization.

538687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17408.

The product of its digits is 40320, while the sum is 37.

The square root of 538687 is about 733.9529957702. The cubic root of 538687 is about 81.3664743707.

It can be divided in two parts, 538 and 687, that added together give a triangular number (1225 = T₄₉).

The spelling of 538687 in words is "five hundred thirty-eight thousand, six hundred eighty-seven".