123304243423 has 4 divisors (see below), whose sum is σ = 123486377400. Its totient is φ = 123122109448.

The previous prime is 123304243397. The next prime is 123304243453. The reversal of 123304243423 is 324342403321.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123304243423 is a prime.

It is a super-2 number, since 2×123304243423² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123304243453) 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, 91065973 + ... + 91067326.

It is an arithmetic number, because the mean of its divisors is an integer number (30871594350).

Almost surely, 2^123304243423 is an apocalyptic number.

123304243423 is a deficient number, since it is larger than the sum of its proper divisors (182133977).

123304243423 is an equidigital number, since it uses as much as digits as its factorization.

123304243423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182133976.

The product of its (nonzero) digits is 41472, while the sum is 31.

Adding to 123304243423 its reverse (324342403321), we get a palindrome (447646646744).

The spelling of 123304243423 in words is "one hundred twenty-three billion, three hundred four million, two hundred forty-three thousand, four hundred twenty-three".