520505539 has 2 divisors, whose sum is σ = 520505540. Its totient is φ = 520505538.

The previous prime is 520505443. The next prime is 520505567. The reversal of 520505539 is 935505025.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 520505539 - 2¹¹ = 520503491 is a prime.

It is a super-2 number, since 2×520505539² = 541852032259361042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (520505569) 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 as a sum of consecutive naturals, namely, 260252769 + 260252770.

It is an arithmetic number, because the mean of its divisors is an integer number (260252770).

Almost surely, 2^520505539 is an apocalyptic number.

520505539 is a deficient number, since it is larger than the sum of its proper divisors (1).

520505539 is an equidigital number, since it uses as much as digits as its factorization.

520505539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33750, while the sum is 34.

The square root of 520505539 is about 22814.5904850383. The cubic root of 520505539 is about 804.4056613758.

The spelling of 520505539 in words is "five hundred twenty million, five hundred five thousand, five hundred thirty-nine".