5644861 has 2 divisors, whose sum is σ = 5644862. Its totient is φ = 5644860.

The previous prime is 5644829. The next prime is 5644889. The reversal of 5644861 is 1684465.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4995225 + 649636 = 2235^2 + 806^2 .

It is a cyclic number.

It is not a de Polignac number, because 5644861 - 2⁵ = 5644829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5644801) 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 as a sum of consecutive naturals, namely, 2822430 + 2822431.

It is an arithmetic number, because the mean of its divisors is an integer number (2822431).

Almost surely, 2^5644861 is an apocalyptic number.

It is an amenable number.

5644861 is a deficient number, since it is larger than the sum of its proper divisors (1).

5644861 is an equidigital number, since it uses as much as digits as its factorization.

5644861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23040, while the sum is 34.

The square root of 5644861 is about 2375.8916221074. The cubic root of 5644861 is about 178.0537333043.

The spelling of 5644861 in words is "five million, six hundred forty-four thousand, eight hundred sixty-one".