320723 has 4 divisors (see below), whose sum is σ = 345408. Its totient is φ = 296040.

The previous prime is 320713. The next prime is 320741. The reversal of 320723 is 327023.

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 320723 - 2⁶ = 320659 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 320723.

It is not an unprimeable number, because it can be changed into a prime (320713) 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, 12323 + ... + 12348.

It is an arithmetic number, because the mean of its divisors is an integer number (86352).

2³²⁰⁷²³ is an apocalyptic number.

320723 is a deficient number, since it is larger than the sum of its proper divisors (24685).

320723 is a wasteful number, since it uses less digits than its factorization.

320723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24684.

The product of its (nonzero) digits is 252, while the sum is 17.

The square root of 320723 is about 566.3241121478. The cubic root of 320723 is about 68.4505121453.

Adding to 320723 its reverse (327023), we get a palindrome (647746).

The spelling of 320723 in words is "three hundred twenty thousand, seven hundred twenty-three", and thus it is an iban number.