123443131405 has 8 divisors (see below), whose sum is σ = 161598281184. Its totient is φ = 89776822800.

The previous prime is 123443131397. The next prime is 123443131421. The reversal of 123443131405 is 504131344321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123443131405 - 2³ = 123443131397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1122210231 + ... + 1122210340.

It is an arithmetic number, because the mean of its divisors is an integer number (20199785148).

Almost surely, 2^123443131405 is an apocalyptic number.

It is an amenable number.

123443131405 is a deficient number, since it is larger than the sum of its proper divisors (38155149779).

123443131405 is a wasteful number, since it uses less digits than its factorization.

123443131405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244420587.

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 123443131405 its reverse (504131344321), we get a palindrome (627574475726).

The spelling of 123443131405 in words is "one hundred twenty-three billion, four hundred forty-three million, one hundred thirty-one thousand, four hundred five".