320717 has 4 divisors (see below), whose sum is σ = 323196. Its totient is φ = 318240.

The previous prime is 320713. The next prime is 320741. The reversal of 320717 is 717023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 717023 = 37 ⋅19379.

It can be written as a sum of positive squares in 2 ways, for example, as 198916 + 121801 = 446^2 + 349^2 .

It is a cyclic number.

It is not a de Polignac number, because 320717 - 2² = 320713 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 320717.

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, 1034 + ... + 1307.

It is an arithmetic number, because the mean of its divisors is an integer number (80799).

2³²⁰⁷¹⁷ is an apocalyptic number.

It is an amenable number.

320717 is a deficient number, since it is larger than the sum of its proper divisors (2479).

320717 is a wasteful number, since it uses less digits than its factorization.

320717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2478.

The product of its (nonzero) digits is 294, while the sum is 20.

The square root of 320717 is about 566.3188148031. The cubic root of 320717 is about 68.4500852914.

The spelling of 320717 in words is "three hundred twenty thousand, seven hundred seventeen", and thus it is an iban number.