505447 has 2 divisors, whose sum is σ = 505448. Its totient is φ = 505446.

The previous prime is 505429. The next prime is 505459. The reversal of 505447 is 744505.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 505447 - 2⁷ = 505319 is a prime.

It is a congruent number.

It is a weakly prime.

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, 252723 + 252724.

It is an arithmetic number, because the mean of its divisors is an integer number (252724).

2⁵⁰⁵⁴⁴⁷ is an apocalyptic number.

505447 is a deficient number, since it is larger than the sum of its proper divisors (1).

505447 is an equidigital number, since it uses as much as digits as its factorization.

505447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 505447 is about 710.9479587143. The cubic root of 505447 is about 79.6572313851.

The spelling of 505447 in words is "five hundred five thousand, four hundred forty-seven".