320291 has 2 divisors, whose sum is σ = 320292. Its totient is φ = 320290.

The previous prime is 320273. The next prime is 320293. The reversal of 320291 is 192023.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 320291 - 2¹⁴ = 303907 is a prime.

It is a Sophie Germain prime.

Together with 320293, it forms a pair of twin primes.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 320291.

It is not a weakly prime, because it can be changed into another prime (320293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160145 + 160146.

It is an arithmetic number, because the mean of its divisors is an integer number (160146).

2³²⁰²⁹¹ is an apocalyptic number.

320291 is a deficient number, since it is larger than the sum of its proper divisors (1).

320291 is an equidigital number, since it uses as much as digits as its factorization.

320291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 320291 is about 565.9425765924. The cubic root of 320291 is about 68.4197650438.

The spelling of 320291 in words is "three hundred twenty thousand, two hundred ninety-one".