506316409 has 4 divisors (see below), whose sum is σ = 514616740. Its totient is φ = 498016080.

The previous prime is 506316359. The next prime is 506316413. The reversal of 506316409 is 904613605.

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 170877184 + 335439225 = 13072^2 + 18315^2 .

It is a cyclic number.

It is not a de Polignac number, because 506316409 - 2⁷ = 506316281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (506316449) 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, 4150074 + ... + 4150195.

It is an arithmetic number, because the mean of its divisors is an integer number (128654185).

Almost surely, 2^506316409 is an apocalyptic number.

It is an amenable number.

506316409 is a deficient number, since it is larger than the sum of its proper divisors (8300331).

506316409 is an equidigital number, since it uses as much as digits as its factorization.

506316409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8300330.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 506316409 is about 22501.4757071620. The cubic root of 506316409 is about 797.0287747918.

The spelling of 506316409 in words is "five hundred six million, three hundred sixteen thousand, four hundred nine".