538891 has 4 divisors (see below), whose sum is σ = 540792. Its totient is φ = 536992.

The previous prime is 538877. The next prime is 538921. The reversal of 538891 is 198835.

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 538891 - 2⁷ = 538763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (538801) 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, 430 + ... + 1123.

It is an arithmetic number, because the mean of its divisors is an integer number (135198).

2⁵³⁸⁸⁹¹ is an apocalyptic number.

538891 is a deficient number, since it is larger than the sum of its proper divisors (1901).

538891 is a wasteful number, since it uses less digits than its factorization.

538891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1900.

The product of its digits is 8640, while the sum is 34.

The square root of 538891 is about 734.0919560927. The cubic root of 538891 is about 81.3767441971.

The spelling of 538891 in words is "five hundred thirty-eight thousand, eight hundred ninety-one".