320123123 has 4 divisors (see below), whose sum is σ = 320887560. Its totient is φ = 319358688.

The previous prime is 320123113. The next prime is 320123129. The reversal of 320123123 is 321321023.

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 320123123 - 2¹⁸ = 319860979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320123129) 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, 381590 + ... + 382427.

It is an arithmetic number, because the mean of its divisors is an integer number (80221890).

Almost surely, 2^320123123 is an apocalyptic number.

320123123 is a deficient number, since it is larger than the sum of its proper divisors (764437).

320123123 is an equidigital number, since it uses as much as digits as its factorization.

320123123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764436.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 320123123 is about 17891.9848815049. The cubic root of 320123123 is about 684.0780913258.

Adding to 320123123 its reverse (321321023), we get a palindrome (641444146).

The spelling of 320123123 in words is "three hundred twenty million, one hundred twenty-three thousand, one hundred twenty-three".