505173 has 4 divisors (see below), whose sum is σ = 673568. Its totient is φ = 336780.

The previous prime is 505159. The next prime is 505181. The reversal of 505173 is 371505.

It is a happy number.

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 not a de Polignac number, because 505173 - 2⁴ = 505157 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505123) 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, 84193 + ... + 84198.

It is an arithmetic number, because the mean of its divisors is an integer number (168392).

2⁵⁰⁵¹⁷³ is an apocalyptic number.

It is an amenable number.

505173 is a deficient number, since it is larger than the sum of its proper divisors (168395).

505173 is a wasteful number, since it uses less digits than its factorization.

505173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168394.

The product of its (nonzero) digits is 525, while the sum is 21.

The square root of 505173 is about 710.7552321299. The cubic root of 505173 is about 79.6428348697.

Adding to 505173 its reverse (371505), we get a palindrome (876678).

The spelling of 505173 in words is "five hundred five thousand, one hundred seventy-three".