500813 has 4 divisors (see below), whose sum is σ = 504768. Its totient is φ = 496860.

The previous prime is 500809. The next prime is 500831. The reversal of 500813 is 318005.

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, and also an emirpimes, since its reverse is a distinct semiprime: 318005 = 5 ⋅63601.

It is a cyclic number.

It is not a de Polignac number, because 500813 - 2² = 500809 is a prime.

It is a Duffinian number.

500813 is a modest number, since divided by 813 gives 5 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 500791 and 500800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (500873) 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, 1781 + ... + 2042.

It is an arithmetic number, because the mean of its divisors is an integer number (126192).

2⁵⁰⁰⁸¹³ is an apocalyptic number.

It is an amenable number.

500813 is a deficient number, since it is larger than the sum of its proper divisors (3955).

500813 is a wasteful number, since it uses less digits than its factorization.

500813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3954.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 500813 is about 707.6814255016. The cubic root of 500813 is about 79.4130478719.

Adding to 500813 its reverse (318005), we get a palindrome (818818).

The spelling of 500813 in words is "five hundred thousand, eight hundred thirteen".