443561 has 2 divisors, whose sum is σ = 443562. Its totient is φ = 443560.

The previous prime is 443551. The next prime is 443563. The reversal of 443561 is 165344.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 430336 + 13225 = 656^2 + 115^2 .

It is a cyclic number.

It is not a de Polignac number, because 443561 - 2¹⁰ = 442537 is a prime.

Together with 443563, it forms a pair of twin primes.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 443561.

It is not a weakly prime, because it can be changed into another prime (443563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221780 + 221781.

It is an arithmetic number, because the mean of its divisors is an integer number (221781).

2⁴⁴³⁵⁶¹ is an apocalyptic number.

It is an amenable number.

443561 is a deficient number, since it is larger than the sum of its proper divisors (1).

443561 is an equidigital number, since it uses as much as digits as its factorization.

443561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 23.

The square root of 443561 is about 666.0037537432. The cubic root of 443561 is about 76.2636847247.

The spelling of 443561 in words is "four hundred forty-three thousand, five hundred sixty-one".