520913 has 2 divisors, whose sum is σ = 520914. Its totient is φ = 520912.

The previous prime is 520889. The next prime is 520921. The reversal of 520913 is 319025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 508369 + 12544 = 713^2 + 112^2 .

It is a cyclic number.

It is not a de Polignac number, because 520913 - 2¹⁰ = 519889 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (520943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260456 + 260457.

It is an arithmetic number, because the mean of its divisors is an integer number (260457).

2⁵²⁰⁹¹³ is an apocalyptic number.

It is an amenable number.

520913 is a deficient number, since it is larger than the sum of its proper divisors (1).

520913 is an equidigital number, since it uses as much as digits as its factorization.

520913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 520913 is about 721.7430290623. The cubic root of 520913 is about 80.4615507651.

Adding to 520913 its reverse (319025), we get a palindrome (839938).

The spelling of 520913 in words is "five hundred twenty thousand, nine hundred thirteen".