320743 has 4 divisors (see below), whose sum is σ = 328608. Its totient is φ = 312880.

The previous prime is 320741. The next prime is 320759. The reversal of 320743 is 347023.

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 320743 - 2¹ = 320741 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 320743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320741) 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, 3871 + ... + 3952.

It is an arithmetic number, because the mean of its divisors is an integer number (82152).

2³²⁰⁷⁴³ is an apocalyptic number.

320743 is a deficient number, since it is larger than the sum of its proper divisors (7865).

320743 is an equidigital number, since it uses as much as digits as its factorization.

320743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7864.

The product of its (nonzero) digits is 504, while the sum is 19.

The square root of 320743 is about 566.3417696056. The cubic root of 320743 is about 68.4519349534.

Adding to 320743 its reverse (347023), we get a palindrome (667766).

The spelling of 320743 in words is "three hundred twenty thousand, seven hundred forty-three", and thus it is an iban number.