320603 has 4 divisors (see below), whose sum is σ = 339480. Its totient is φ = 301728.

The previous prime is 320591. The next prime is 320609. The reversal of 320603 is 306023.

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 320603 - 2⁶ = 320539 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 320603.

It is not an unprimeable number, because it can be changed into a prime (320609) 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, 9413 + ... + 9446.

It is an arithmetic number, because the mean of its divisors is an integer number (84870).

2³²⁰⁶⁰³ is an apocalyptic number.

320603 is a deficient number, since it is larger than the sum of its proper divisors (18877).

320603 is a wasteful number, since it uses less digits than its factorization.

320603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18876.

The product of its (nonzero) digits is 108, while the sum is 14.

The square root of 320603 is about 566.2181558375. The cubic root of 320603 is about 68.4419740547.

Adding to 320603 its reverse (306023), we get a palindrome (626626).

The spelling of 320603 in words is "three hundred twenty thousand, six hundred three".