505403513 has 2 divisors, whose sum is σ = 505403514. Its totient is φ = 505403512.

The previous prime is 505403491. The next prime is 505403519. The reversal of 505403513 is 315304505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 461949049 + 43454464 = 21493^2 + 6592^2 .

It is a cyclic number.

It is not a de Polignac number, because 505403513 - 2¹⁶ = 505337977 is a prime.

It is not a weakly prime, because it can be changed into another prime (505403519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252701756 + 252701757.

It is an arithmetic number, because the mean of its divisors is an integer number (252701757).

Almost surely, 2^505403513 is an apocalyptic number.

It is an amenable number.

505403513 is a deficient number, since it is larger than the sum of its proper divisors (1).

505403513 is an equidigital number, since it uses as much as digits as its factorization.

505403513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 505403513 is about 22481.1813079295. The cubic root of 505403513 is about 796.5494683741.

The spelling of 505403513 in words is "five hundred five million, four hundred three thousand, five hundred thirteen".