320323403 has 6 divisors (see below), whose sum is σ = 330990732. Its totient is φ = 309989460.

The previous prime is 320323351. The next prime is 320323411. The reversal of 320323403 is 304323023.

It is a de Polignac number, because none of the positive numbers 2^k-320323403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320323453) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 165701 + ... + 167622.

It is an arithmetic number, because the mean of its divisors is an integer number (55165122).

Almost surely, 2^320323403 is an apocalyptic number.

320323403 is a deficient number, since it is larger than the sum of its proper divisors (10667329).

320323403 is an equidigital number, since it uses as much as digits as its factorization.

320323403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333385 (or 333354 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 20.

The square root of 320323403 is about 17897.5809259240. The cubic root of 320323403 is about 684.2207224866.

Adding to 320323403 its reverse (304323023), we get a palindrome (624646426).

The spelling of 320323403 in words is "three hundred twenty million, three hundred twenty-three thousand, four hundred three".