421123323 has 4 divisors (see below), whose sum is σ = 561497768. Its totient is φ = 280748880.

The previous prime is 421123309. The next prime is 421123387. The reversal of 421123323 is 323321124.

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

It is not a de Polignac number, because 421123323 - 2⁹ = 421122811 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 421123323.

It is not an unprimeable number, because it can be changed into a prime (421123393) 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 3 ways as a sum of consecutive naturals, for example, 70187218 + ... + 70187223.

It is an arithmetic number, because the mean of its divisors is an integer number (140374442).

Almost surely, 2^421123323 is an apocalyptic number.

421123323 is a deficient number, since it is larger than the sum of its proper divisors (140374445).

421123323 is a wasteful number, since it uses less digits than its factorization.

421123323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140374444.

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

The square root of 421123323 is about 20521.2895062664. The cubic root of 421123323 is about 749.5542969620.

Adding to 421123323 its reverse (323321124), we get a palindrome (744444447).

The spelling of 421123323 in words is "four hundred twenty-one million, one hundred twenty-three thousand, three hundred twenty-three".