1040443109 has 2 divisors, whose sum is σ = 1040443110. Its totient is φ = 1040443108.

The previous prime is 1040443099. The next prime is 1040443123. The reversal of 1040443109 is 9013440401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1022592484 + 17850625 = 31978^2 + 4225^2 .

It is a cyclic number.

It is not a de Polignac number, because 1040443109 - 2¹² = 1040439013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1040443139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520221554 + 520221555.

It is an arithmetic number, because the mean of its divisors is an integer number (520221555).

Almost surely, 2^1040443109 is an apocalyptic number.

It is an amenable number.

1040443109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040443109 is an equidigital number, since it uses as much as digits as its factorization.

1040443109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 1040443109 is about 32255.9003749702. The cubic root of 1040443109 is about 1013.3032744311.

The spelling of 1040443109 in words is "one billion, forty million, four hundred forty-three thousand, one hundred nine".