320653 has 4 divisors (see below), whose sum is σ = 331740. Its totient is φ = 309568.

The previous prime is 320647. The next prime is 320657. The reversal of 320653 is 356023.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 110889 + 209764 = 333^2 + 458^2 .

It is a cyclic number.

It is not a de Polignac number, because 320653 - 2⁹ = 320141 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320657) 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, 5500 + ... + 5557.

It is an arithmetic number, because the mean of its divisors is an integer number (82935).

2³²⁰⁶⁵³ is an apocalyptic number.

It is an amenable number.

320653 is a deficient number, since it is larger than the sum of its proper divisors (11087).

320653 is a wasteful number, since it uses less digits than its factorization.

320653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11086.

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 320653 is about 566.2623067095. The cubic root of 320653 is about 68.4455318513.

Adding to 320653 its reverse (356023), we get a palindrome (676676).

The spelling of 320653 in words is "three hundred twenty thousand, six hundred fifty-three".