505813 has 8 divisors (see below), whose sum is σ = 630720. Its totient is φ = 394080.

The previous prime is 505811. The next prime is 505819. The reversal of 505813 is 318505.

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 505813 - 2¹ = 505811 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 (505811) 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, 3208 + ... + 3361.

It is an arithmetic number, because the mean of its divisors is an integer number (78840).

2⁵⁰⁵⁸¹³ is an apocalyptic number.

It is an amenable number.

505813 is a deficient number, since it is larger than the sum of its proper divisors (124907).

505813 is a wasteful number, since it uses less digits than its factorization.

505813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6587.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 505813 is about 711.2053149408. The cubic root of 505813 is about 79.6764536527.

The spelling of 505813 in words is "five hundred five thousand, eight hundred thirteen".