423321123 has 16 divisors (see below), whose sum is σ = 577704960. Its totient is φ = 275624544.

The previous prime is 423321109. The next prime is 423321133. The reversal of 423321123 is 321123324.

It is not a de Polignac number, because 423321123 - 2¹⁷ = 423190051 is a prime.

It is a super-2 number, since 2×423321123² = 358401546355962258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 423321123.

It is not an unprimeable number, because it can be changed into a prime (423321103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29488 + ... + 41426.

It is an arithmetic number, because the mean of its divisors is an integer number (36106560).

Almost surely, 2^423321123 is an apocalyptic number.

423321123 is a deficient number, since it is larger than the sum of its proper divisors (154383837).

423321123 is a wasteful number, since it uses less digits than its factorization.

423321123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12218.

The product of its digits is 864, while the sum is 21.

The square root of 423321123 is about 20574.7690874041. The cubic root of 423321123 is about 750.8559844602.

Adding to 423321123 its reverse (321123324), we get a palindrome (744444447).

The spelling of 423321123 in words is "four hundred twenty-three million, three hundred twenty-one thousand, one hundred twenty-three".