423040123 has 4 divisors (see below), whose sum is σ = 461498328. Its totient is φ = 384581920.

The previous prime is 423040109. The next prime is 423040133. The reversal of 423040123 is 321040324.

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

It is a cyclic number.

It is not a de Polignac number, because 423040123 - 2²¹ = 420942971 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 423040123.

It is not an unprimeable number, because it can be changed into a prime (423040133) 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, 19229086 + ... + 19229107.

It is an arithmetic number, because the mean of its divisors is an integer number (115374582).

Almost surely, 2^423040123 is an apocalyptic number.

423040123 is a deficient number, since it is larger than the sum of its proper divisors (38458205).

423040123 is a wasteful number, since it uses less digits than its factorization.

423040123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38458204.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 423040123 is about 20567.9392015826. The cubic root of 423040123 is about 750.6898086168.

Adding to 423040123 its reverse (321040324), we get a palindrome (744080447).

The spelling of 423040123 in words is "four hundred twenty-three million, forty thousand, one hundred twenty-three".