505687 has 8 divisors (see below), whose sum is σ = 622496. Its totient is φ = 400032.

The previous prime is 505669. The next prime is 505691. The reversal of 505687 is 786505.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 505687 - 2⁷ = 505559 is a prime.

505687 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2688 + ... + 2869.

It is an arithmetic number, because the mean of its divisors is an integer number (77812).

2⁵⁰⁵⁶⁸⁷ is an apocalyptic number.

505687 is a deficient number, since it is larger than the sum of its proper divisors (116809).

505687 is a wasteful number, since it uses less digits than its factorization.

505687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5577.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 505687 is about 711.1167274084. The cubic root of 505687 is about 79.6698371977.

The spelling of 505687 in words is "five hundred five thousand, six hundred eighty-seven".