320332997 has 2 divisors, whose sum is σ = 320332998. Its totient is φ = 320332996.

The previous prime is 320332981. The next prime is 320333003. The reversal of 320332997 is 799233023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 287166916 + 33166081 = 16946^2 + 5759^2 .

It is a cyclic number.

It is not a de Polignac number, because 320332997 - 2⁴ = 320332981 is a prime.

It is a super-2 number, since 2×320332997² = 205226457934004018, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320332997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320332907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160166498 + 160166499.

It is an arithmetic number, because the mean of its divisors is an integer number (160166499).

Almost surely, 2^320332997 is an apocalyptic number.

It is an amenable number.

320332997 is a deficient number, since it is larger than the sum of its proper divisors (1).

320332997 is an equidigital number, since it uses as much as digits as its factorization.

320332997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61236, while the sum is 38.

The square root of 320332997 is about 17897.8489489659. The cubic root of 320332997 is about 684.2275534456.

The spelling of 320332997 in words is "three hundred twenty million, three hundred thirty-two thousand, nine hundred ninety-seven".