509079 has 4 divisors (see below), whose sum is σ = 678776. Its totient is φ = 339384.

The previous prime is 509071. The next prime is 509087. The reversal of 509079 is 970905.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (509071) and next prime (509087).

It is not a de Polignac number, because 509079 - 2³ = 509071 is a prime.

It is a super-2 number, since 2×509079² = 518322856482, which contains 22 as substring.

It is a D-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 (509071) 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, 84844 + ... + 84849.

It is an arithmetic number, because the mean of its divisors is an integer number (169694).

2⁵⁰⁹⁰⁷⁹ is an apocalyptic number.

509079 is a deficient number, since it is larger than the sum of its proper divisors (169697).

509079 is a wasteful number, since it uses less digits than its factorization.

509079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169696.

The product of its (nonzero) digits is 2835, while the sum is 30.

The square root of 509079 is about 713.4977224911. The cubic root of 509079 is about 79.8475743480.

The spelling of 509079 in words is "five hundred nine thousand, seventy-nine".