505021073 has 2 divisors, whose sum is σ = 505021074. Its totient is φ = 505021072.

The previous prime is 505021037. The next prime is 505021079. The reversal of 505021073 is 370120505.

Together with previous prime (505021037) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 388208209 + 116812864 = 19703^2 + 10808^2 .

It is a cyclic number.

It is not a de Polignac number, because 505021073 - 2¹⁰ = 505020049 is a prime.

It is not a weakly prime, because it can be changed into another prime (505021079) 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, 252510536 + 252510537.

It is an arithmetic number, because the mean of its divisors is an integer number (252510537).

Almost surely, 2^505021073 is an apocalyptic number.

It is an amenable number.

505021073 is a deficient number, since it is larger than the sum of its proper divisors (1).

505021073 is an equidigital number, since it uses as much as digits as its factorization.

505021073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1050, while the sum is 23.

The square root of 505021073 is about 22472.6739174492. The cubic root of 505021073 is about 796.3485007368.

Adding to 505021073 its reverse (370120505), we get a palindrome (875141578).

The spelling of 505021073 in words is "five hundred five million, twenty-one thousand, seventy-three".