520730911 has 2 divisors, whose sum is σ = 520730912. Its totient is φ = 520730910.

The previous prime is 520730887. The next prime is 520730921. The reversal of 520730911 is 119037025.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 520730911 - 2⁷ = 520730783 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 520730911.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520730921) 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, 260365455 + 260365456.

It is an arithmetic number, because the mean of its divisors is an integer number (260365456).

Almost surely, 2^520730911 is an apocalyptic number.

520730911 is a deficient number, since it is larger than the sum of its proper divisors (1).

520730911 is an equidigital number, since it uses as much as digits as its factorization.

520730911 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 520730911 is about 22819.5291581575. The cubic root of 520730911 is about 804.5217436202.

Adding to 520730911 its reverse (119037025), we get a palindrome (639767936).

The spelling of 520730911 in words is "five hundred twenty million, seven hundred thirty thousand, nine hundred eleven".