5820813 has 6 divisors (see below), whose sum is σ = 8407854. Its totient is φ = 3880536.

The previous prime is 5820797. The next prime is 5820823. The reversal of 5820813 is 3180285.

It is a happy number.

5820813 is a `hidden beast` number, since 582 + 0 + 81 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3755844 + 2064969 = 1938^2 + 1437^2 .

It is not a de Polignac number, because 5820813 - 2⁴ = 5820797 is a prime.

5820813 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5820823) 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 5 ways as a sum of consecutive naturals, for example, 323370 + ... + 323387.

It is an arithmetic number, because the mean of its divisors is an integer number (1401309).

Almost surely, 2^5820813 is an apocalyptic number.

It is an amenable number.

5820813 is a deficient number, since it is larger than the sum of its proper divisors (2587041).

5820813 is a wasteful number, since it uses less digits than its factorization.

5820813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646763 (or 646760 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 5820813 is about 2412.6361101501. The cubic root of 5820813 is about 179.8848337383.

The spelling of 5820813 in words is "five million, eight hundred twenty thousand, eight hundred thirteen".