43443428773 has 2 divisors, whose sum is σ = 43443428774. Its totient is φ = 43443428772.

The previous prime is 43443428741. The next prime is 43443428779. The reversal of 43443428773 is 37782434434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36594542209 + 6848886564 = 191297^2 + 82758^2 .

It is a cyclic number.

It is not a de Polignac number, because 43443428773 - 2⁵ = 43443428741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43443428779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21721714386 + 21721714387.

It is an arithmetic number, because the mean of its divisors is an integer number (21721714387).

Almost surely, 2^43443428773 is an apocalyptic number.

It is an amenable number.

43443428773 is a deficient number, since it is larger than the sum of its proper divisors (1).

43443428773 is an equidigital number, since it uses as much as digits as its factorization.

43443428773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5419008, while the sum is 49.

The spelling of 43443428773 in words is "forty-three billion, four hundred forty-three million, four hundred twenty-eight thousand, seven hundred seventy-three".