520686713 has 2 divisors, whose sum is σ = 520686714. Its totient is φ = 520686712.

The previous prime is 520686703. The next prime is 520686737. The reversal of 520686713 is 317686025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 352387984 + 168298729 = 18772^2 + 12973^2 .

It is a cyclic number.

It is not a de Polignac number, because 520686713 - 2⁸ = 520686457 is a prime.

It is a super-2 number, since 2×520686713² = 542229306189488738, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (520686703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260343356 + 260343357.

It is an arithmetic number, because the mean of its divisors is an integer number (260343357).

Almost surely, 2^520686713 is an apocalyptic number.

It is an amenable number.

520686713 is a deficient number, since it is larger than the sum of its proper divisors (1).

520686713 is an equidigital number, since it uses as much as digits as its factorization.

520686713 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 520686713 is about 22818.5607127181. The cubic root of 520686713 is about 804.4989812188.

It can be divided in two parts, 5206 and 86713, that added together give a palindrome (91919).

The spelling of 520686713 in words is "five hundred twenty million, six hundred eighty-six thousand, seven hundred thirteen".