123243431320323 has 24 divisors (see below), whose sum is σ = 179334959390496. Its totient is φ = 81555430320000.

The previous prime is 123243431320319. The next prime is 123243431320391. The reversal of 123243431320323 is 323023134342321.

123243431320323 is a `hidden beast` number, since 1 + 2 + 3 + 2 + 4 + 3 + 4 + 3 + 1 + 320 + 323 = 666.

It is not a de Polignac number, because 123243431320323 - 2² = 123243431320319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123243431320423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33084690 + ... + 36620807.

It is an arithmetic number, because the mean of its divisors is an integer number (7472289974604).

Almost surely, 2^{123243431320323} is an apocalyptic number.

123243431320323 is a deficient number, since it is larger than the sum of its proper divisors (56091528070173).

123243431320323 is a wasteful number, since it uses less digits than its factorization.

123243431320323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69706955 (or 69706952 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 36.

Adding to 123243431320323 its reverse (323023134342321), we get a palindrome (446266565662644).

The spelling of 123243431320323 in words is "one hundred twenty-three trillion, two hundred forty-three billion, four hundred thirty-one million, three hundred twenty thousand, three hundred twenty-three".