1123412443 has 2 divisors, whose sum is σ = 1123412444. Its totient is φ = 1123412442.

The previous prime is 1123412431. The next prime is 1123412447. The reversal of 1123412443 is 3442143211.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123412443 is a prime.

It is not a weakly prime, because it can be changed into another prime (1123412447) 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, 561706221 + 561706222.

It is an arithmetic number, because the mean of its divisors is an integer number (561706222).

Almost surely, 2^1123412443 is an apocalyptic number.

1123412443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123412443 is an equidigital number, since it uses as much as digits as its factorization.

1123412443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 25.

The square root of 1123412443 is about 33517.3454050287. The cubic root of 1123412443 is about 1039.5524587571.

Adding to 1123412443 its reverse (3442143211), we get a palindrome (4565555654).

The spelling of 1123412443 in words is "one billion, one hundred twenty-three million, four hundred twelve thousand, four hundred forty-three".