320203123 has 16 divisors (see below), whose sum is σ = 343238400. Its totient is φ = 298045440.

The previous prime is 320203073. The next prime is 320203183. The reversal of 320203123 is 321302023.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320203123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320203097 and 320203106.

It is not an unprimeable number, because it can be changed into a prime (320203183) 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, 316843 + ... + 317851.

It is an arithmetic number, because the mean of its divisors is an integer number (21452400).

Almost surely, 2^320203123 is an apocalyptic number.

320203123 is a deficient number, since it is larger than the sum of its proper divisors (23035277).

320203123 is a wasteful number, since it uses less digits than its factorization.

320203123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1422.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 320203123 is about 17894.2203797763. The cubic root of 320203123 is about 684.1350711618.

Adding to 320203123 its reverse (321302023), we get a palindrome (641505146).

The spelling of 320203123 in words is "three hundred twenty million, two hundred three thousand, one hundred twenty-three".