320003 has 4 divisors (see below), whose sum is σ = 323400. Its totient is φ = 316608.

The previous prime is 319993. The next prime is 320009. The reversal of 320003 is 300023.

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

It is not a de Polignac number, because 320003 - 2⁸ = 319747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1553 + ... + 1746.

It is an arithmetic number, because the mean of its divisors is an integer number (80850).

2³²⁰⁰⁰³ is an apocalyptic number.

320003 is a deficient number, since it is larger than the sum of its proper divisors (3397).

320003 is an equidigital number, since it uses as much as digits as its factorization.

320003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3396.

The product of its (nonzero) digits is 18, while the sum is 8.

The square root of 320003 is about 565.6880765935. The cubic root of 320003 is about 68.3992516134.

Adding to 320003 its reverse (300023), we get a palindrome (620026).

The spelling of 320003 in words is "three hundred twenty thousand, three", and thus it is an iban number.