1123943043 has 32 divisors (see below), whose sum is σ = 1625305600. Its totient is φ = 688455936.

The previous prime is 1123943039. The next prime is 1123943059. The reversal of 1123943043 is 3403493211.

It is not a de Polignac number, because 1123943043 - 2² = 1123943039 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1123943043.

It is not an unprimeable number, because it can be changed into a prime (1123943243) 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 in 31 ways as a sum of consecutive naturals, for example, 861930 + ... + 863232.

It is an arithmetic number, because the mean of its divisors is an integer number (50790800).

Almost surely, 2^1123943043 is an apocalyptic number.

1123943043 is a deficient number, since it is larger than the sum of its proper divisors (501362557).

1123943043 is a wasteful number, since it uses less digits than its factorization.

1123943043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1771.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 1123943043 is about 33525.2597752799. The cubic root of 1123943043 is about 1039.7160970008.

The spelling of 1123943043 in words is "one billion, one hundred twenty-three million, nine hundred forty-three thousand, forty-three".