505887 has 4 divisors (see below), whose sum is σ = 674520. Its totient is φ = 337256.

The previous prime is 505877. The next prime is 505907. The reversal of 505887 is 788505.

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 505887 - 2⁴ = 505871 is a prime.

It is an Ulam number.

It is a D-number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 505887.

It is not an unprimeable number, because it can be changed into a prime (505867) 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, 84312 + ... + 84317.

It is an arithmetic number, because the mean of its divisors is an integer number (168630).

2⁵⁰⁵⁸⁸⁷ is an apocalyptic number.

505887 is a deficient number, since it is larger than the sum of its proper divisors (168633).

505887 is a wasteful number, since it uses less digits than its factorization.

505887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168632.

The product of its (nonzero) digits is 11200, while the sum is 33.

The square root of 505887 is about 711.2573373962. The cubic root of 505887 is about 79.6803389951.

The spelling of 505887 in words is "five hundred five thousand, eight hundred eighty-seven".