1243310023 has 4 divisors (see below), whose sum is σ = 1243381000. Its totient is φ = 1243239048.

The previous prime is 1243310021. The next prime is 1243310027. The reversal of 1243310023 is 3200133421.

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 1243310023 - 2¹ = 1243310021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243310021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11728 + ... + 51226.

It is an arithmetic number, because the mean of its divisors is an integer number (310845250).

Almost surely, 2^1243310023 is an apocalyptic number.

1243310023 is a deficient number, since it is larger than the sum of its proper divisors (70977).

1243310023 is an equidigital number, since it uses as much as digits as its factorization.

1243310023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70976.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1243310023 is about 35260.6015688899. The cubic root of 1243310023 is about 1075.2921572605.

Adding to 1243310023 its reverse (3200133421), we get a palindrome (4443443444).

The spelling of 1243310023 in words is "one billion, two hundred forty-three million, three hundred ten thousand, twenty-three".