1123231423 has 4 divisors (see below), whose sum is σ = 1149353128. Its totient is φ = 1097109720.

The previous prime is 1123231411. The next prime is 1123231433. The reversal of 1123231423 is 3241323211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3241323211 = 7 ⋅463046173.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123231423 is a prime.

It is a super-2 number, since 2×1123231423² = 2523297659229209858, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1123231394 and 1123231403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123231433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13060788 + ... + 13060873.

It is an arithmetic number, because the mean of its divisors is an integer number (287338282).

Almost surely, 2^1123231423 is an apocalyptic number.

1123231423 is a deficient number, since it is larger than the sum of its proper divisors (26121705).

1123231423 is an equidigital number, since it uses as much as digits as its factorization.

1123231423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26121704.

The product of its digits is 864, while the sum is 22.

The square root of 1123231423 is about 33514.6449033851. The cubic root of 1123231423 is about 1039.4966199908.

Adding to 1123231423 its reverse (3241323211), we get a palindrome (4364554634).

The spelling of 1123231423 in words is "one billion, one hundred twenty-three million, two hundred thirty-one thousand, four hundred twenty-three".