320672017 has 2 divisors, whose sum is σ = 320672018. Its totient is φ = 320672016.

The previous prime is 320671999. The next prime is 320672047. The reversal of 320672017 is 710276023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 287505936 + 33166081 = 16956^2 + 5759^2 .

It is a cyclic number.

It is not a de Polignac number, because 320672017 - 2¹¹ = 320669969 is a prime.

It is not a weakly prime, because it can be changed into another prime (320672047) 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 as a sum of consecutive naturals, namely, 160336008 + 160336009.

It is an arithmetic number, because the mean of its divisors is an integer number (160336009).

Almost surely, 2^320672017 is an apocalyptic number.

It is an amenable number.

320672017 is a deficient number, since it is larger than the sum of its proper divisors (1).

320672017 is an equidigital number, since it uses as much as digits as its factorization.

320672017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 320672017 is about 17907.3174149564. The cubic root of 320672017 is about 684.4688492663.

The spelling of 320672017 in words is "three hundred twenty million, six hundred seventy-two thousand, seventeen".