1243020304423 has 4 divisors (see below), whose sum is σ = 1266473517768. Its totient is φ = 1219567091080.

The previous prime is 1243020304399. The next prime is 1243020304433. The reversal of 1243020304423 is 3244030203421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1243020304423 - 2⁵ = 1243020304391 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1243020304391 and 1243020304400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243020304433) 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, 11726606593 + ... + 11726606698.

It is an arithmetic number, because the mean of its divisors is an integer number (316618379442).

Almost surely, 2^{1243020304423} is an apocalyptic number.

1243020304423 is a deficient number, since it is larger than the sum of its proper divisors (23453213345).

1243020304423 is an equidigital number, since it uses as much as digits as its factorization.

1243020304423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23453213344.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 1243020304423 its reverse (3244030203421), we get a palindrome (4487050507844).

The spelling of 1243020304423 in words is "one trillion, two hundred forty-three billion, twenty million, three hundred four thousand, four hundred twenty-three".