320497 has 4 divisors (see below), whose sum is σ = 328356. Its totient is φ = 312640.

The previous prime is 320483. The next prime is 320513. The reversal of 320497 is 794023.

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 5776 + 314721 = 76^2 + 561^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320417) 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, 3868 + ... + 3949.

It is an arithmetic number, because the mean of its divisors is an integer number (82089).

2³²⁰⁴⁹⁷ is an apocalyptic number.

It is an amenable number.

320497 is a deficient number, since it is larger than the sum of its proper divisors (7859).

320497 is an equidigital number, since it uses as much as digits as its factorization.

320497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7858.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 320497 is about 566.1245446013. The cubic root of 320497 is about 68.4344303023.

The spelling of 320497 in words is "three hundred twenty thousand, four hundred ninety-seven".