43040443387 has 2 divisors, whose sum is σ = 43040443388. Its totient is φ = 43040443386.

The previous prime is 43040443373. The next prime is 43040443417. The reversal of 43040443387 is 78334404034.

43040443387 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 is a cyclic number.

It is not a de Polignac number, because 43040443387 - 2¹⁵ = 43040410619 is a prime.

It is not a weakly prime, because it can be changed into another prime (43040443337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21520221693 + 21520221694.

It is an arithmetic number, because the mean of its divisors is an integer number (21520221694).

Almost surely, 2^43040443387 is an apocalyptic number.

43040443387 is a deficient number, since it is larger than the sum of its proper divisors (1).

43040443387 is an equidigital number, since it uses as much as digits as its factorization.

43040443387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 387072, while the sum is 40.

The spelling of 43040443387 in words is "forty-three billion, forty million, four hundred forty-three thousand, three hundred eighty-seven".