505443 has 4 divisors (see below), whose sum is σ = 673928. Its totient is φ = 336960.

The previous prime is 505429. The next prime is 505447. The reversal of 505443 is 344505.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 505443 - 2⁵ = 505411 is a prime.

It is a D-number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 505443.

It is not an unprimeable number, because it can be changed into a prime (505447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84238 + ... + 84243.

It is an arithmetic number, because the mean of its divisors is an integer number (168482).

2⁵⁰⁵⁴⁴³ is an apocalyptic number.

505443 is a deficient number, since it is larger than the sum of its proper divisors (168485).

505443 is a wasteful number, since it uses less digits than its factorization.

505443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168484.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 505443 is about 710.9451455633. The cubic root of 505443 is about 79.6570212544.

Adding to 505443 its reverse (344505), we get a palindrome (849948).

The spelling of 505443 in words is "five hundred five thousand, four hundred forty-three".