520347747 has 16 divisors (see below), whose sum is σ = 735328800. Its totient is φ = 326172672.

The previous prime is 520347721. The next prime is 520347749. The reversal of 520347747 is 747743025.

It is not a de Polignac number, because 520347747 - 2¹¹ = 520345699 is a prime.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (520347749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54379 + ... + 63227.

It is an arithmetic number, because the mean of its divisors is an integer number (45958050).

Almost surely, 2^520347747 is an apocalyptic number.

520347747 is a deficient number, since it is larger than the sum of its proper divisors (214981053).

520347747 is a wasteful number, since it uses less digits than its factorization.

520347747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10022.

The product of its (nonzero) digits is 164640, while the sum is 39.

The square root of 520347747 is about 22811.1320850150. The cubic root of 520347747 is about 804.3243675842.

The spelling of 520347747 in words is "five hundred twenty million, three hundred forty-seven thousand, seven hundred forty-seven".