42443689 has 2 divisors, whose sum is σ = 42443690. Its totient is φ = 42443688.

The previous prime is 42443683. The next prime is 42443719. The reversal of 42443689 is 98634424.

42443689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39275289 + 3168400 = 6267^2 + 1780^2 .

It is a cyclic number.

It is not a de Polignac number, because 42443689 - 2⁵ = 42443657 is a prime.

It is not a weakly prime, because it can be changed into another prime (42443683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21221844 + 21221845.

It is an arithmetic number, because the mean of its divisors is an integer number (21221845).

Almost surely, 2^42443689 is an apocalyptic number.

It is an amenable number.

42443689 is a deficient number, since it is larger than the sum of its proper divisors (1).

42443689 is an equidigital number, since it uses as much as digits as its factorization.

42443689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165888, while the sum is 40.

The square root of 42443689 is about 6514.8821171223. The cubic root of 42443689 is about 348.8224069972.

The spelling of 42443689 in words is "forty-two million, four hundred forty-three thousand, six hundred eighty-nine".