520476685 has 4 divisors (see below), whose sum is σ = 624572028. Its totient is φ = 416381344.

The previous prime is 520476667. The next prime is 520476707. The reversal of 520476685 is 586674025.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 113486409 + 406990276 = 10653^2 + 20174^2 .

It is a cyclic number.

It is not a de Polignac number, because 520476685 - 2⁵ = 520476653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52047664 + ... + 52047673.

It is an arithmetic number, because the mean of its divisors is an integer number (156143007).

Almost surely, 2^520476685 is an apocalyptic number.

It is an amenable number.

520476685 is a deficient number, since it is larger than the sum of its proper divisors (104095343).

520476685 is a wasteful number, since it uses less digits than its factorization.

520476685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104095342.

The product of its (nonzero) digits is 403200, while the sum is 43.

The square root of 520476685 is about 22813.9581177839. The cubic root of 520476685 is about 804.3907971409.

The spelling of 520476685 in words is "five hundred twenty million, four hundred seventy-six thousand, six hundred eighty-five".