1123043203 has 24 divisors (see below), whose sum is σ = 1233178128. Its totient is φ = 1021699008.

The previous prime is 1123043197. The next prime is 1123043237. The reversal of 1123043203 is 3023403211.

It is a de Polignac number, because none of the positive numbers 2^k-1123043203 is a prime.

It is a super-2 number, since 2×1123043203² = 2522452071608998418, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (1123043303) 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 23 ways as a sum of consecutive naturals, for example, 1108125 + ... + 1109137.

It is an arithmetic number, because the mean of its divisors is an integer number (51382422).

Almost surely, 2^1123043203 is an apocalyptic number.

1123043203 is a deficient number, since it is larger than the sum of its proper divisors (110134925).

1123043203 is a wasteful number, since it uses less digits than its factorization.

1123043203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1171 (or 1152 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1123043203 is about 33511.8367595690. The cubic root of 1123043203 is about 1039.4385538971.

Adding to 1123043203 its reverse (3023403211), we get a palindrome (4146446414).

The spelling of 1123043203 in words is "one billion, one hundred twenty-three million, forty-three thousand, two hundred three".