321123423 has 8 divisors (see below), whose sum is σ = 434030128. Its totient is φ = 211149504.

The previous prime is 321123419. The next prime is 321123433. The reversal of 321123423 is 324321123.

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

It is not a de Polignac number, because 321123423 - 2² = 321123419 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 321123423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321123403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 732940 + ... + 733377.

It is an arithmetic number, because the mean of its divisors is an integer number (54253766).

Almost surely, 2^321123423 is an apocalyptic number.

321123423 is a deficient number, since it is larger than the sum of its proper divisors (112906705).

321123423 is a wasteful number, since it uses less digits than its factorization.

321123423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1466393.

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

The square root of 321123423 is about 17919.9169361914. The cubic root of 321123423 is about 684.7898714354.

Adding to 321123423 its reverse (324321123), we get a palindrome (645444546).

The spelling of 321123423 in words is "three hundred twenty-one million, one hundred twenty-three thousand, four hundred twenty-three".