505000073 has 2 divisors, whose sum is σ = 505000074. Its totient is φ = 505000072.

The previous prime is 505000043. The next prime is 505000091. The reversal of 505000073 is 370000505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 358420624 + 146579449 = 18932^2 + 12107^2 .

It is a cyclic number.

It is not a de Polignac number, because 505000073 - 2¹⁰ = 504999049 is a prime.

It is not a weakly prime, because it can be changed into another prime (505000003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252500036 + 252500037.

It is an arithmetic number, because the mean of its divisors is an integer number (252500037).

Almost surely, 2^505000073 is an apocalyptic number.

It is an amenable number.

505000073 is a deficient number, since it is larger than the sum of its proper divisors (1).

505000073 is an equidigital number, since it uses as much as digits as its factorization.

505000073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 525, while the sum is 20.

The square root of 505000073 is about 22472.2066784729. The cubic root of 505000073 is about 796.3374625503.

Adding to 505000073 its reverse (370000505), we get a palindrome (875000578).

The spelling of 505000073 in words is "five hundred five million, seventy-three", and thus it is an aban number.