500505509 has 16 divisors (see below), whose sum is σ = 604200960. Its totient is φ = 405503280.

The previous prime is 500505503. The next prime is 500505529. The reversal of 500505509 is 905505005.

It is not a de Polignac number, because 500505509 - 2⁴ = 500505493 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (500505503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17489 + ... + 36150.

It is an arithmetic number, because the mean of its divisors is an integer number (37762560).

Almost surely, 2^500505509 is an apocalyptic number.

It is an amenable number.

500505509 is a deficient number, since it is larger than the sum of its proper divisors (103695451).

500505509 is a wasteful number, since it uses less digits than its factorization.

500505509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53720.

The product of its (nonzero) digits is 5625, while the sum is 29.

The square root of 500505509 is about 22371.9804442968. The cubic root of 500505509 is about 793.9679177312.

The spelling of 500505509 in words is "five hundred million, five hundred five thousand, five hundred nine".