520655697 has 6 divisors (see below), whose sum is σ = 752058242. Its totient is φ = 347103792.

The previous prime is 520655693. The next prime is 520655711. The reversal of 520655697 is 796556025.

520655697 is a `hidden beast` number, since 5 + 2 + 0 + 6 + 556 + 97 = 666.

It can be written as a sum of positive squares in only one way, i.e., 293128641 + 227527056 = 17121^2 + 15084^2 .

It is not a de Polignac number, because 520655697 - 2² = 520655693 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520655693) 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 5 ways as a sum of consecutive naturals, for example, 28925308 + ... + 28925325.

Almost surely, 2^520655697 is an apocalyptic number.

It is an amenable number.

520655697 is a deficient number, since it is larger than the sum of its proper divisors (231402545).

520655697 is a wasteful number, since it uses less digits than its factorization.

520655697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57850639 (or 57850636 counting only the distinct ones).

The product of its (nonzero) digits is 567000, while the sum is 45.

The square root of 520655697 is about 22817.8810804159. The cubic root of 520655697 is about 804.4830069069.

The spelling of 520655697 in words is "five hundred twenty million, six hundred fifty-five thousand, six hundred ninety-seven".