320423243 has 8 divisors (see below), whose sum is σ = 370610688. Its totient is φ = 271338984.

The previous prime is 320423209. The next prime is 320423251. The reversal of 320423243 is 342324023.

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

It is a de Polignac number, because none of the positive numbers 2^k-320423243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320423273) 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 7 ways as a sum of consecutive naturals, for example, 275171 + ... + 276332.

It is an arithmetic number, because the mean of its divisors is an integer number (46326336).

Almost surely, 2^320423243 is an apocalyptic number.

320423243 is a deficient number, since it is larger than the sum of its proper divisors (50187445).

320423243 is an equidigital number, since it uses as much as digits as its factorization.

320423243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551593.

The product of its (nonzero) digits is 3456, while the sum is 23.

The square root of 320423243 is about 17900.3699123789. The cubic root of 320423243 is about 684.2918022143.

Adding to 320423243 its reverse (342324023), we get a palindrome (662747266).

The spelling of 320423243 in words is "three hundred twenty million, four hundred twenty-three thousand, two hundred forty-three".