1243243323 has 20 divisors (see below), whose sum is σ = 2122504560. Its totient is φ = 710424432.

The previous prime is 1243243301. The next prime is 1243243333. The reversal of 1243243323 is 3233423421.

1243243323 is a `hidden beast` number, since 1 + 2 + 4 + 324 + 332 + 3 = 666.

It is not a de Polignac number, because 1243243323 - 2¹² = 1243239227 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1243243333) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1095768 + ... + 1096901.

It is an arithmetic number, because the mean of its divisors is an integer number (106125228).

Almost surely, 2^1243243323 is an apocalyptic number.

1243243323 is a deficient number, since it is larger than the sum of its proper divisors (879261237).

1243243323 is an equidigital number, since it uses as much as digits as its factorization.

1243243323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2192688 (or 2192679 counting only the distinct ones).

The product of its digits is 10368, while the sum is 27.

The square root of 1243243323 is about 35259.6557413710. The cubic root of 1243243323 is about 1075.2729281414.

Adding to 1243243323 its reverse (3233423421), we get a palindrome (4476666744).

It can be divided in two parts, 12432 and 43323, that added together give a palindrome (55755).

The spelling of 1243243323 in words is "one billion, two hundred forty-three million, two hundred forty-three thousand, three hundred twenty-three".