443609 has 2 divisors, whose sum is σ = 443610. Its totient is φ = 443608.

The previous prime is 443603. The next prime is 443629. The reversal of 443609 is 906344.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 299209 + 144400 = 547^2 + 380^2 .

It is a cyclic number.

It is not a de Polignac number, because 443609 - 2⁸ = 443353 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 443609.

It is not a weakly prime, because it can be changed into another prime (443603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221804 + 221805.

It is an arithmetic number, because the mean of its divisors is an integer number (221805).

2⁴⁴³⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

443609 is a deficient number, since it is larger than the sum of its proper divisors (1).

443609 is an equidigital number, since it uses as much as digits as its factorization.

443609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 443609 is about 666.0397886013. The cubic root of 443609 is about 76.2664355863.

The spelling of 443609 in words is "four hundred forty-three thousand, six hundred nine".