506009 has 4 divisors (see below), whose sum is σ = 578304. Its totient is φ = 433716.

The previous prime is 505979. The next prime is 506047. The reversal of 506009 is 900605.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-506009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (506609) 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, 36137 + ... + 36150.

It is an arithmetic number, because the mean of its divisors is an integer number (144576).

2⁵⁰⁶⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

506009 is a deficient number, since it is larger than the sum of its proper divisors (72295).

506009 is an equidigital number, since it uses as much as digits as its factorization.

506009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72294.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 506009 is about 711.3430958405. The cubic root of 506009 is about 79.6867437324.

The spelling of 506009 in words is "five hundred six thousand, nine".