505545013 has 2 divisors, whose sum is σ = 505545014. Its totient is φ = 505545012.

The previous prime is 505544987. The next prime is 505545121. The reversal of 505545013 is 310545505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 502746084 + 2798929 = 22422^2 + 1673^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505545013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505549013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252772506 + 252772507.

It is an arithmetic number, because the mean of its divisors is an integer number (252772507).

Almost surely, 2^505545013 is an apocalyptic number.

It is an amenable number.

505545013 is a deficient number, since it is larger than the sum of its proper divisors (1).

505545013 is an equidigital number, since it uses as much as digits as its factorization.

505545013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7500, while the sum is 28.

The square root of 505545013 is about 22484.3281643015. The cubic root of 505545013 is about 796.6237992336.

The spelling of 505545013 in words is "five hundred five million, five hundred forty-five thousand, thirteen".