5809813 has 4 divisors (see below), whose sum is σ = 5820460. Its totient is φ = 5799168.

The previous prime is 5809757. The next prime is 5809829. The reversal of 5809813 is 3189085.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3189085 = 5 ⋅637817.

It can be written as a sum of positive squares in 2 ways, for example, as 4153444 + 1656369 = 2038^2 + 1287^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5809813 is a prime.

It is a Duffinian number.

5809813 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5809873) 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, 4458 + ... + 5611.

It is an arithmetic number, because the mean of its divisors is an integer number (1455115).

Almost surely, 2^5809813 is an apocalyptic number.

It is an amenable number.

5809813 is a deficient number, since it is larger than the sum of its proper divisors (10647).

5809813 is a wasteful number, since it uses less digits than its factorization.

5809813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10646.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 5809813 is about 2410.3553679904. The cubic root of 5809813 is about 179.7714486074.

The spelling of 5809813 in words is "five million, eight hundred nine thousand, eight hundred thirteen".