5661589 has 2 divisors, whose sum is σ = 5661590. Its totient is φ = 5661588.

The previous prime is 5661587. The next prime is 5661613. The reversal of 5661589 is 9851665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4774225 + 887364 = 2185^2 + 942^2 .

It is a cyclic number.

It is not a de Polignac number, because 5661589 - 2¹ = 5661587 is a prime.

Together with 5661587, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5661587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2830794 + 2830795.

It is an arithmetic number, because the mean of its divisors is an integer number (2830795).

Almost surely, 2^5661589 is an apocalyptic number.

It is an amenable number.

5661589 is a deficient number, since it is larger than the sum of its proper divisors (1).

5661589 is an equidigital number, since it uses as much as digits as its factorization.

5661589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 40.

The square root of 5661589 is about 2379.4093804976. The cubic root of 5661589 is about 178.2294415303.

The spelling of 5661589 in words is "five million, six hundred sixty-one thousand, five hundred eighty-nine".