538663 has 4 divisors (see below), whose sum is σ = 541648. Its totient is φ = 535680.

The previous prime is 538651. The next prime is 538697. The reversal of 538663 is 366835.

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 538663 - 2⁹ = 538151 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538163) 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, 1203 + ... + 1588.

It is an arithmetic number, because the mean of its divisors is an integer number (135412).

2⁵³⁸⁶⁶³ is an apocalyptic number.

538663 is a deficient number, since it is larger than the sum of its proper divisors (2985).

538663 is a wasteful number, since it uses less digits than its factorization.

538663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2984.

The product of its digits is 12960, while the sum is 31.

The square root of 538663 is about 733.9366457672. The cubic root of 538663 is about 81.3652659854.

The spelling of 538663 in words is "five hundred thirty-eight thousand, six hundred sixty-three".