506004809 has 4 divisors (see below), whose sum is σ = 506223300. Its totient is φ = 505786320.

The previous prime is 506004791. The next prime is 506004817. The reversal of 506004809 is 908400605.

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 184878409 + 321126400 = 13597^2 + 17920^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-506004809 is a prime.

It is a super-2 number, since 2×506004809² = 512081733462252962, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (506004839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105734 + ... + 110415.

It is an arithmetic number, because the mean of its divisors is an integer number (126555825).

Almost surely, 2^506004809 is an apocalyptic number.

It is an amenable number.

506004809 is a deficient number, since it is larger than the sum of its proper divisors (218491).

506004809 is a wasteful number, since it uses less digits than its factorization.

506004809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218490.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 506004809 is about 22494.5506512133. The cubic root of 506004809 is about 796.8652373101.

The spelling of 506004809 in words is "five hundred six million, four thousand, eight hundred nine".