520864929 has 18 divisors (see below), whose sum is σ = 814688550. Its totient is φ = 320531328.

The previous prime is 520864871. The next prime is 520864931. The reversal of 520864929 is 929468025.

520864929 is a `hidden beast` number, since 520 + 86 + 49 + 2 + 9 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 41254929 + 479610000 = 6423^2 + 21900^2 .

It is not a de Polignac number, because 520864929 - 2¹² = 520860833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (520864229) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 169704 + ... + 172745.

It is an arithmetic number, because the mean of its divisors is an integer number (45260475).

Almost surely, 2^520864929 is an apocalyptic number.

It is an amenable number.

520864929 is a deficient number, since it is larger than the sum of its proper divisors (293823621).

520864929 is a wasteful number, since it uses less digits than its factorization.

520864929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342481 (or 342465 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 520864929 is about 22822.4654452581. The cubic root of 520864929 is about 804.5907563255.

The spelling of 520864929 in words is "five hundred twenty million, eight hundred sixty-four thousand, nine hundred twenty-nine".