538999 has 4 divisors (see below), whose sum is σ = 544336. Its totient is φ = 533664.

The previous prime is 538987. The next prime is 539003. The reversal of 538999 is 999835.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999835 = 5 ⋅199967.

It is a cyclic number.

It is not a de Polignac number, because 538999 - 2⁷ = 538871 is a prime.

It is a Duffinian number.

538999 is a modest number, since divided by 999 gives 538 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2514 + ... + 2719.

It is an arithmetic number, because the mean of its divisors is an integer number (136084).

2⁵³⁸⁹⁹⁹ is an apocalyptic number.

538999 is a deficient number, since it is larger than the sum of its proper divisors (5337).

538999 is a wasteful number, since it uses less digits than its factorization.

538999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5336.

The product of its digits is 87480, while the sum is 43.

The square root of 538999 is about 734.1655126741. The cubic root of 538999 is about 81.3821801148.

The spelling of 538999 in words is "five hundred thirty-eight thousand, nine hundred ninety-nine".