505344013 has 2 divisors, whose sum is σ = 505344014. Its totient is φ = 505344012.

The previous prime is 505344011. The next prime is 505344019. The reversal of 505344013 is 310443505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 334963204 + 170380809 = 18302^2 + 13053^2 .

It is a cyclic number.

It is not a de Polignac number, because 505344013 - 2¹ = 505344011 is a prime.

Together with 505344011, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505344011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252672006 + 252672007.

It is an arithmetic number, because the mean of its divisors is an integer number (252672007).

Almost surely, 2^505344013 is an apocalyptic number.

It is an amenable number.

505344013 is a deficient number, since it is larger than the sum of its proper divisors (1).

505344013 is an equidigital number, since it uses as much as digits as its factorization.

505344013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 505344013 is about 22479.8579399426. The cubic root of 505344013 is about 796.5182084981.

Adding to 505344013 its reverse (310443505), we get a palindrome (815787518).

The spelling of 505344013 in words is "five hundred five million, three hundred forty-four thousand, thirteen".