520040713 has 2 divisors, whose sum is σ = 520040714. Its totient is φ = 520040712.

The previous prime is 520040687. The next prime is 520040737. The reversal of 520040713 is 317040025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 495863824 + 24176889 = 22268^2 + 4917^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520040713 is a prime.

It is not a weakly prime, because it can be changed into another prime (520040813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260020356 + 260020357.

It is an arithmetic number, because the mean of its divisors is an integer number (260020357).

Almost surely, 2^520040713 is an apocalyptic number.

It is an amenable number.

520040713 is a deficient number, since it is larger than the sum of its proper divisors (1).

520040713 is an equidigital number, since it uses as much as digits as its factorization.

520040713 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 520040713 is about 22804.4011760888. The cubic root of 520040713 is about 804.1661378122.

Adding to 520040713 its reverse (317040025), we get a palindrome (837080738).

The spelling of 520040713 in words is "five hundred twenty million, forty thousand, seven hundred thirteen".