1996128943 has 2 divisors, whose sum is σ = 1996128944. Its totient is φ = 1996128942.

The previous prime is 1996128919. The next prime is 1996129019. The reversal of 1996128943 is 3498216991.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1996128943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1996128443) 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, 998064471 + 998064472.

It is an arithmetic number, because the mean of its divisors is an integer number (998064472).

Almost surely, 2^1996128943 is an apocalyptic number.

1996128943 is a deficient number, since it is larger than the sum of its proper divisors (1).

1996128943 is an equidigital number, since it uses as much as digits as its factorization.

1996128943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 52.

The square root of 1996128943 is about 44678.0588544310. The cubic root of 1996128943 is about 1259.1076538519.

The spelling of 1996128943 in words is "one billion, nine hundred ninety-six million, one hundred twenty-eight thousand, nine hundred forty-three".