500605561 has 4 divisors (see below), whose sum is σ = 501926800. Its totient is φ = 499284324.

The previous prime is 500605549. The next prime is 500605583. The reversal of 500605561 is 165506005.

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-500605561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (500605361) 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, 660051 + ... + 660808.

It is an arithmetic number, because the mean of its divisors is an integer number (125481700).

Almost surely, 2^500605561 is an apocalyptic number.

It is an amenable number.

500605561 is a deficient number, since it is larger than the sum of its proper divisors (1321239).

500605561 is a wasteful number, since it uses less digits than its factorization.

500605561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321238.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 500605561 is about 22374.2164332072. The cubic root of 500605561 is about 794.0208194369.

The spelling of 500605561 in words is "five hundred million, six hundred five thousand, five hundred sixty-one".