520047209 has 16 divisors (see below), whose sum is σ = 573168960. Its totient is φ = 467928000.

The previous prime is 520047197. The next prime is 520047257. The reversal of 520047209 is 902740025.

It is a cyclic number.

It is not a de Polignac number, because 520047209 - 2⁴ = 520047193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520047259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 535094 + ... + 536064.

It is an arithmetic number, because the mean of its divisors is an integer number (35823060).

Almost surely, 2^520047209 is an apocalyptic number.

It is an amenable number.

520047209 is a deficient number, since it is larger than the sum of its proper divisors (53121751).

520047209 is a wasteful number, since it uses less digits than its factorization.

520047209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1432.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 520047209 is about 22804.5436042908. The cubic root of 520047209 is about 804.1694861663.

The spelling of 520047209 in words is "five hundred twenty million, forty-seven thousand, two hundred nine".