1243133323 has 4 divisors (see below), whose sum is σ = 1243242160. Its totient is φ = 1243024488.

The previous prime is 1243133267. The next prime is 1243133327. The reversal of 1243133323 is 3233313421.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1243133323 - 2¹⁷ = 1243002251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1243133327) 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, 34968 + ... + 60901.

It is an arithmetic number, because the mean of its divisors is an integer number (310810540).

Almost surely, 2^1243133323 is an apocalyptic number.

1243133323 is a deficient number, since it is larger than the sum of its proper divisors (108837).

1243133323 is an equidigital number, since it uses as much as digits as its factorization.

1243133323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108836.

The product of its digits is 3888, while the sum is 25.

The square root of 1243133323 is about 35258.0958504568. The cubic root of 1243133323 is about 1075.2412144485.

Adding to 1243133323 its reverse (3233313421), we get a palindrome (4476446744).

It can be divided in two parts, 12431 and 33323, that added together give a palindrome (45754).

The spelling of 1243133323 in words is "one billion, two hundred forty-three million, one hundred thirty-three thousand, three hundred twenty-three".