423172123 has 16 divisors (see below), whose sum is σ = 490775040. Its totient is φ = 360828000.

The previous prime is 423172093. The next prime is 423172157. The reversal of 423172123 is 321271324.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 423172123 - 2⁵ = 423172091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423176123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11086 + ... + 31132.

It is an arithmetic number, because the mean of its divisors is an integer number (30673440).

Almost surely, 2^423172123 is an apocalyptic number.

423172123 is a deficient number, since it is larger than the sum of its proper divisors (67602917).

423172123 is a wasteful number, since it uses less digits than its factorization.

423172123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20178.

The product of its digits is 2016, while the sum is 25.

The square root of 423172123 is about 20571.1478289375. The cubic root of 423172123 is about 750.7678790289.

The spelling of 423172123 in words is "four hundred twenty-three million, one hundred seventy-two thousand, one hundred twenty-three".