509039 has 4 divisors (see below), whose sum is σ = 515256. Its totient is φ = 502824.

The previous prime is 509027. The next prime is 509053. The reversal of 509039 is 930905.

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 509039 - 2⁴ = 509023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 508999 and 509017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509239) 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, 2984 + ... + 3149.

It is an arithmetic number, because the mean of its divisors is an integer number (128814).

2⁵⁰⁹⁰³⁹ is an apocalyptic number.

509039 is a deficient number, since it is larger than the sum of its proper divisors (6217).

509039 is an equidigital number, since it uses as much as digits as its factorization.

509039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6216.

The product of its (nonzero) digits is 1215, while the sum is 26.

The square root of 509039 is about 713.4696910171. The cubic root of 509039 is about 79.8454829983.

The spelling of 509039 in words is "five hundred nine thousand, thirty-nine".