506798209 has 4 divisors (see below), whose sum is σ = 510497604. Its totient is φ = 503098816.

The previous prime is 506798197. The next prime is 506798219. The reversal of 506798209 is 902897605.

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 254083600 + 252714609 = 15940^2 + 15897^2 .

It is a cyclic number.

It is not a de Polignac number, because 506798209 - 2¹⁷ = 506667137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (506798219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1849492 + ... + 1849765.

It is an arithmetic number, because the mean of its divisors is an integer number (127624401).

Almost surely, 2^506798209 is an apocalyptic number.

It is an amenable number.

506798209 is a deficient number, since it is larger than the sum of its proper divisors (3699395).

506798209 is a wasteful number, since it uses less digits than its factorization.

506798209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3699394.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 506798209 is about 22512.1791259753. The cubic root of 506798209 is about 797.2815065596.

The spelling of 506798209 in words is "five hundred six million, seven hundred ninety-eight thousand, two hundred nine".