500500009 has 16 divisors (see below), whose sum is σ = 557539200. Its totient is φ = 447080704.

The previous prime is 500500003. The next prime is 500500019. The reversal of 500500009 is 900005005.

It is not a de Polignac number, because 500500009 - 2⁵ = 500499977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (500500003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20484 + ... + 37690.

It is an arithmetic number, because the mean of its divisors is an integer number (34846200).

Almost surely, 2^500500009 is an apocalyptic number.

500500009 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

It is an amenable number.

500500009 is a deficient number, since it is larger than the sum of its proper divisors (57039191).

500500009 is a wasteful number, since it uses less digits than its factorization.

500500009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17312.

The product of its (nonzero) digits is 225, while the sum is 19.

The square root of 500500009 is about 22371.8575223427. The cubic root of 500500009 is about 793.9650094451.

The spelling of 500500009 in words is "five hundred million, five hundred thousand, nine".