508813 has 4 divisors (see below), whose sum is σ = 514620. Its totient is φ = 503008.

The previous prime is 508811. The next prime is 508817. The reversal of 508813 is 318805.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 318805 = 5 ⋅63761.

It can be written as a sum of positive squares in 2 ways, for example, as 191844 + 316969 = 438^2 + 563^2 .

It is a cyclic number.

It is not a de Polignac number, because 508813 - 2¹ = 508811 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 (508811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2770 + ... + 2947.

It is an arithmetic number, because the mean of its divisors is an integer number (128655).

2⁵⁰⁸⁸¹³ is an apocalyptic number.

It is an amenable number.

508813 is a deficient number, since it is larger than the sum of its proper divisors (5807).

508813 is an equidigital number, since it uses as much as digits as its factorization.

508813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5806.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 508813 is about 713.3112924944. The cubic root of 508813 is about 79.8336648139.

The spelling of 508813 in words is "five hundred eight thousand, eight hundred thirteen".