320623 has 4 divisors (see below), whose sum is σ = 321768. Its totient is φ = 319480.

The previous prime is 320611. The next prime is 320627. The reversal of 320623 is 326023.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 320623 - 2⁵ = 320591 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 320597 and 320606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165 + ... + 817.

It is an arithmetic number, because the mean of its divisors is an integer number (80442).

2³²⁰⁶²³ is an apocalyptic number.

320623 is a deficient number, since it is larger than the sum of its proper divisors (1145).

320623 is an equidigital number, since it uses as much as digits as its factorization.

320623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144.

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

The square root of 320623 is about 566.2358165994. The cubic root of 320623 is about 68.4433972178.

Adding to 320623 its reverse (326023), we get a palindrome (646646).

The spelling of 320623 in words is "three hundred twenty thousand, six hundred twenty-three".