1243123343 has 32 divisors (see below), whose sum is σ = 1669496832. Its totient is φ = 896623200.

The previous prime is 1243123339. The next prime is 1243123361. The reversal of 1243123343 is 3433213421.

It is not a de Polignac number, because 1243123343 - 2² = 1243123339 is a prime.

It is a super-2 number, since 2×1243123343² = 3090711291822991298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243123943) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43580 + ... + 66222.

It is an arithmetic number, because the mean of its divisors is an integer number (52171776).

Almost surely, 2^1243123343 is an apocalyptic number.

1243123343 is a deficient number, since it is larger than the sum of its proper divisors (426373489).

1243123343 is a wasteful number, since it uses less digits than its factorization.

1243123343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22715.

The product of its digits is 5184, while the sum is 26.

The square root of 1243123343 is about 35257.9543223937. The cubic root of 1243123343 is about 1075.2383370591.

Adding to 1243123343 its reverse (3433213421), we get a palindrome (4676336764).

The spelling of 1243123343 in words is "one billion, two hundred forty-three million, one hundred twenty-three thousand, three hundred forty-three".