505403273 has 2 divisors, whose sum is σ = 505403274. Its totient is φ = 505403272.

The previous prime is 505403237. The next prime is 505403299. The reversal of 505403273 is 372304505.

Together with previous prime (505403237) 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., 299566864 + 205836409 = 17308^2 + 14347^2 .

It is a cyclic number.

It is not a de Polignac number, because 505403273 - 2¹² = 505399177 is a prime.

It is a super-2 number, since 2×505403273² = 510864936718225058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (505403203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252701636 + 252701637.

It is an arithmetic number, because the mean of its divisors is an integer number (252701637).

Almost surely, 2^505403273 is an apocalyptic number.

It is an amenable number.

505403273 is a deficient number, since it is larger than the sum of its proper divisors (1).

505403273 is an equidigital number, since it uses as much as digits as its factorization.

505403273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12600, while the sum is 29.

The square root of 505403273 is about 22481.1759701311. The cubic root of 505403273 is about 796.5493422887.

Adding to 505403273 its reverse (372304505), we get a palindrome (877707778).

The spelling of 505403273 in words is "five hundred five million, four hundred three thousand, two hundred seventy-three".