520505017 has 2 divisors, whose sum is σ = 520505018. Its totient is φ = 520505016.

The previous prime is 520504921. The next prime is 520505023. The reversal of 520505017 is 710505025.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 412739856 + 107765161 = 20316^2 + 10381^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520505017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 520504982 and 520505000.

It is not a weakly prime, because it can be changed into another prime (520505077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260252508 + 260252509.

It is an arithmetic number, because the mean of its divisors is an integer number (260252509).

Almost surely, 2^520505017 is an apocalyptic number.

It is an amenable number.

520505017 is a deficient number, since it is larger than the sum of its proper divisors (1).

520505017 is an equidigital number, since it uses as much as digits as its factorization.

520505017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1750, while the sum is 25.

The square root of 520505017 is about 22814.5790449879. The cubic root of 520505017 is about 804.4053924707.

The spelling of 520505017 in words is "five hundred twenty million, five hundred five thousand, seventeen".