509349 has 4 divisors (see below), whose sum is σ = 679136. Its totient is φ = 339564.

The previous prime is 509329. The next prime is 509359. The reversal of 509349 is 943905.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 509349 - 2⁵ = 509317 is a prime.

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 (509329) 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, 84889 + ... + 84894.

It is an arithmetic number, because the mean of its divisors is an integer number (169784).

2⁵⁰⁹³⁴⁹ is an apocalyptic number.

It is an amenable number.

509349 is a deficient number, since it is larger than the sum of its proper divisors (169787).

509349 is a wasteful number, since it uses less digits than its factorization.

509349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169786.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 509349 is about 713.6869061430. The cubic root of 509349 is about 79.8616880939.

It can be divided in two parts, 509 and 349, that added together give a palindrome (858).

The spelling of 509349 in words is "five hundred nine thousand, three hundred forty-nine".