505477 has 4 divisors (see below), whose sum is σ = 577696. Its totient is φ = 433260.

The previous prime is 505469. The next prime is 505481. The reversal of 505477 is 774505.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 505477 - 2³ = 505469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505447) 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 in 3 ways as a sum of consecutive naturals, for example, 36099 + ... + 36112.

It is an arithmetic number, because the mean of its divisors is an integer number (144424).

2⁵⁰⁵⁴⁷⁷ is an apocalyptic number.

It is an amenable number.

505477 is a deficient number, since it is larger than the sum of its proper divisors (72219).

505477 is an equidigital number, since it uses as much as digits as its factorization.

505477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72218.

The product of its (nonzero) digits is 4900, while the sum is 28.

The square root of 505477 is about 710.9690569919. The cubic root of 505477 is about 79.6588073299.

Adding to 505477 its sum of digits (28), we get a palindrome (505505).

The spelling of 505477 in words is "five hundred five thousand, four hundred seventy-seven".