518039 has 4 divisors (see below), whose sum is σ = 519480. Its totient is φ = 516600.

The previous prime is 518017. The next prime is 518047. The reversal of 518039 is 930815.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 930815 = 5 ⋅186163.

It is a cyclic number.

It is not a de Polignac number, because 518039 - 2¹² = 513943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 517999 and 518017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (518059) 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, 332 + ... + 1070.

It is an arithmetic number, because the mean of its divisors is an integer number (129870).

2⁵¹⁸⁰³⁹ is an apocalyptic number.

518039 is a deficient number, since it is larger than the sum of its proper divisors (1441).

518039 is an equidigital number, since it uses as much as digits as its factorization.

518039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1440.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 518039 is about 719.7492618961. The cubic root of 518039 is about 80.3133026663.

The spelling of 518039 in words is "five hundred eighteen thousand, thirty-nine".