505889 has 4 divisors (see below), whose sum is σ = 522240. Its totient is φ = 489540.

The previous prime is 505877. The next prime is 505907. The reversal of 505889 is 988505.

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 a cyclic number.

It is not a de Polignac number, because 505889 - 2⁸ = 505633 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (505819) 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, 8129 + ... + 8190.

It is an arithmetic number, because the mean of its divisors is an integer number (130560).

2⁵⁰⁵⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

505889 is a deficient number, since it is larger than the sum of its proper divisors (16351).

505889 is a wasteful number, since it uses less digits than its factorization.

505889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16350.

The product of its (nonzero) digits is 14400, while the sum is 35.

The square root of 505889 is about 711.2587433557. The cubic root of 505889 is about 79.6804439991.

The spelling of 505889 in words is "five hundred five thousand, eight hundred eighty-nine".