5665813 has 4 divisors (see below), whose sum is σ = 5674860. Its totient is φ = 5656768.

The previous prime is 5665789. The next prime is 5665837. The reversal of 5665813 is 3185665.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (5665789) and next prime (5665837).

It can be written as a sum of positive squares in 2 ways, for example, as 5121169 + 544644 = 2263^2 + 738^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5665813 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 (5665853) 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, 3508 + ... + 4861.

It is an arithmetic number, because the mean of its divisors is an integer number (1418715).

Almost surely, 2^5665813 is an apocalyptic number.

It is an amenable number.

5665813 is a deficient number, since it is larger than the sum of its proper divisors (9047).

5665813 is an equidigital number, since it uses as much as digits as its factorization.

5665813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9046.

The product of its digits is 21600, while the sum is 34.

The square root of 5665813 is about 2380.2968302294. The cubic root of 5665813 is about 178.2737550032.

The spelling of 5665813 in words is "five million, six hundred sixty-five thousand, eight hundred thirteen".