320006243 has 2 divisors, whose sum is σ = 320006244. Its totient is φ = 320006242.

The previous prime is 320006237. The next prime is 320006333. The reversal of 320006243 is 342600023.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 320006243 - 2⁶ = 320006179 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (325006243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160003121 + 160003122.

It is an arithmetic number, because the mean of its divisors is an integer number (160003122).

Almost surely, 2^320006243 is an apocalyptic number.

320006243 is a deficient number, since it is larger than the sum of its proper divisors (1).

320006243 is an equidigital number, since it uses as much as digits as its factorization.

320006243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 320006243 is about 17888.7183163020. The cubic root of 320006243 is about 683.9948267167.

Adding to 320006243 its reverse (342600023), we get a palindrome (662606266).

The spelling of 320006243 in words is "three hundred twenty million, six thousand, two hundred forty-three".