505879 has 4 divisors (see below), whose sum is σ = 551880. Its totient is φ = 459880.

The previous prime is 505877. The next prime is 505907. The reversal of 505879 is 978505.

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

It is a cyclic number.

It is not a de Polignac number, because 505879 - 2¹ = 505877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505871) 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, 22984 + ... + 23005.

It is an arithmetic number, because the mean of its divisors is an integer number (137970).

2⁵⁰⁵⁸⁷⁹ is an apocalyptic number.

505879 is a deficient number, since it is larger than the sum of its proper divisors (46001).

505879 is a wasteful number, since it uses less digits than its factorization.

505879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46000.

The product of its (nonzero) digits is 12600, while the sum is 34.

The square root of 505879 is about 711.2517135304. The cubic root of 505879 is about 79.6799189764.

It can be divided in two parts, 50 and 5879, that added together give a square (5929 = 77²).

The spelling of 505879 in words is "five hundred five thousand, eight hundred seventy-nine".