1123123443 has 8 divisors (see below), whose sum is σ = 1612690128. Its totient is φ = 691152864.

The previous prime is 1123123429. The next prime is 1123123453. The reversal of 1123123443 is 3443213211.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1123123443 - 2⁴ = 1123123427 is a prime.

It is a super-2 number, since 2×1123123443² = 2522812536432348498, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1123123403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14398980 + ... + 14399057.

It is an arithmetic number, because the mean of its divisors is an integer number (201586266).

Almost surely, 2^1123123443 is an apocalyptic number.

1123123443 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1123123443 is a deficient number, since it is larger than the sum of its proper divisors (489566685).

1123123443 is a wasteful number, since it uses less digits than its factorization.

1123123443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28798053.

The product of its digits is 1728, while the sum is 24.

The square root of 1123123443 is about 33513.0339271156. The cubic root of 1123123443 is about 1039.4633088258.

Adding to 1123123443 its reverse (3443213211), we get a palindrome (4566336654).

The spelling of 1123123443 in words is "one billion, one hundred twenty-three million, one hundred twenty-three thousand, four hundred forty-three".