123243431202423 has 12 divisors (see below), whose sum is σ = 203449473731088. Its totient is φ = 70424817829920.

The previous prime is 123243431202389. The next prime is 123243431202439. The reversal of 123243431202423 is 324202134342321.

123243431202423 is a `hidden beast` number, since 1 + 2 + 3 + 24 + 3 + 4 + 3 + 1 + 202 + 423 = 666.

It is not a de Polignac number, because 123243431202423 - 2³³ = 123234841267831 is a prime.

It is a super-2 number, since 2×123243431202423² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123243431202473) 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 11 ways as a sum of consecutive naturals, for example, 978122469798 + ... + 978122469923.

It is an arithmetic number, because the mean of its divisors is an integer number (16954122810924).

Almost surely, 2^{123243431202423} is an apocalyptic number.

123243431202423 is a deficient number, since it is larger than the sum of its proper divisors (80206042528665).

123243431202423 is a wasteful number, since it uses less digits than its factorization.

123243431202423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1956244939734 (or 1956244939731 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 36.

Adding to 123243431202423 its reverse (324202134342321), we get a palindrome (447445565544744).

The spelling of 123243431202423 in words is "one hundred twenty-three trillion, two hundred forty-three billion, four hundred thirty-one million, two hundred two thousand, four hundred twenty-three".