520530407 has 2 divisors, whose sum is σ = 520530408. Its totient is φ = 520530406.

The previous prime is 520530317. The next prime is 520530431. The reversal of 520530407 is 704035025.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 520530407 - 2⁸ = 520530151 is a prime.

It is a super-2 number, since 2×520530407² = 541903809223171298, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520530487) 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, 260265203 + 260265204.

It is an arithmetic number, because the mean of its divisors is an integer number (260265204).

Almost surely, 2^520530407 is an apocalyptic number.

520530407 is a deficient number, since it is larger than the sum of its proper divisors (1).

520530407 is an equidigital number, since it uses as much as digits as its factorization.

520530407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 26.

The square root of 520530407 is about 22815.1354806409. The cubic root of 520530407 is about 804.4184717687.

The spelling of 520530407 in words is "five hundred twenty million, five hundred thirty thousand, four hundred seven".