123303404243 has 4 divisors (see below), whose sum is σ = 126635928720. Its totient is φ = 119970879768.

The previous prime is 123303404227. The next prime is 123303404249. The reversal of 123303404243 is 342404303321.

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 123303404243 - 2⁴ = 123303404227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123303404249) 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, 1666262183 + ... + 1666262256.

It is an arithmetic number, because the mean of its divisors is an integer number (31658982180).

Almost surely, 2^123303404243 is an apocalyptic number.

123303404243 is a deficient number, since it is larger than the sum of its proper divisors (3332524477).

123303404243 is an equidigital number, since it uses as much as digits as its factorization.

123303404243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3332524476.

The product of its (nonzero) digits is 20736, while the sum is 29.

Adding to 123303404243 its reverse (342404303321), we get a palindrome (465707707564).

The spelling of 123303404243 in words is "one hundred twenty-three billion, three hundred three million, four hundred four thousand, two hundred forty-three".