500906509 has 4 divisors (see below), whose sum is σ = 507768316. Its totient is φ = 494044704.

The previous prime is 500906503. The next prime is 500906537. The reversal of 500906509 is 905609005.

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

It can be written as a sum of positive squares in 2 ways, for example, as 203861284 + 297045225 = 14278^2 + 17235^2 .

It is a cyclic number.

It is not a de Polignac number, because 500906509 - 2⁹ = 500905997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (500906503) 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 3 ways as a sum of consecutive naturals, for example, 3430794 + ... + 3430939.

It is an arithmetic number, because the mean of its divisors is an integer number (126942079).

Almost surely, 2^500906509 is an apocalyptic number.

It is an amenable number.

500906509 is a deficient number, since it is larger than the sum of its proper divisors (6861807).

500906509 is an equidigital number, since it uses as much as digits as its factorization.

500906509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6861806.

The product of its (nonzero) digits is 12150, while the sum is 34.

The square root of 500906509 is about 22380.9407532391. The cubic root of 500906509 is about 794.1799008424.

The spelling of 500906509 in words is "five hundred million, nine hundred six thousand, five hundred nine".