520564939 has 8 divisors (see below), whose sum is σ = 551845008. Its totient is φ = 489358080.

The previous prime is 520564931. The next prime is 520564949. The reversal of 520564939 is 939465025.

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 520564939 - 2³ = 520564931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 520564895 and 520564904.

It is not an unprimeable number, because it can be changed into a prime (520564931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3297 + ... + 32434.

It is an arithmetic number, because the mean of its divisors is an integer number (68980626).

Almost surely, 2^520564939 is an apocalyptic number.

520564939 is a deficient number, since it is larger than the sum of its proper divisors (31280069).

520564939 is a wasteful number, since it uses less digits than its factorization.

520564939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36605.

The product of its (nonzero) digits is 291600, while the sum is 43.

The square root of 520564939 is about 22815.8922464146. The cubic root of 520564939 is about 804.4362597558.

The spelling of 520564939 in words is "five hundred twenty million, five hundred sixty-four thousand, nine hundred thirty-nine".