320443 has 4 divisors (see below), whose sum is σ = 322920. Its totient is φ = 317968.

The previous prime is 320431. The next prime is 320449. The reversal of 320443 is 344023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 344023 = 53 ⋅6491.

It is a cyclic number.

It is not a de Polignac number, because 320443 - 2⁹ = 319931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320449) 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, 1033 + ... + 1306.

It is an arithmetic number, because the mean of its divisors is an integer number (80730).

2³²⁰⁴⁴³ is an apocalyptic number.

320443 is a deficient number, since it is larger than the sum of its proper divisors (2477).

320443 is a wasteful number, since it uses less digits than its factorization.

320443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2476.

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 320443 is about 566.0768499064. The cubic root of 320443 is about 68.4305866191.

Adding to 320443 its reverse (344023), we get a palindrome (664466).

The spelling of 320443 in words is "three hundred twenty thousand, four hundred forty-three", and thus it is an iban number.