520429809 has 8 divisors (see below), whose sum is σ = 724076352. Its totient is φ = 331868240.

The previous prime is 520429799. The next prime is 520429813. The reversal of 520429809 is 908924025.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 520429809 - 2²¹ = 518332657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (520429849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3771162 + ... + 3771299.

It is an arithmetic number, because the mean of its divisors is an integer number (90509544).

Almost surely, 2^520429809 is an apocalyptic number.

It is an amenable number.

520429809 is a deficient number, since it is larger than the sum of its proper divisors (203646543).

520429809 is a wasteful number, since it uses less digits than its factorization.

520429809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7542487.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 520429809 is about 22812.9307411389. The cubic root of 520429809 is about 804.3666476409.

The spelling of 520429809 in words is "five hundred twenty million, four hundred twenty-nine thousand, eight hundred nine".