320333989 has 2 divisors, whose sum is σ = 320333990. Its totient is φ = 320333988.

The previous prime is 320333983. The next prime is 320334023. The reversal of 320333989 is 989333023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166152100 + 154181889 = 12890^2 + 12417^2 .

It is a cyclic number.

It is not a de Polignac number, because 320333989 - 2¹⁹ = 319809701 is a prime.

It is a super-2 number, since 2×320333989² = 205227729017304242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320333983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160166994 + 160166995.

It is an arithmetic number, because the mean of its divisors is an integer number (160166995).

Almost surely, 2^320333989 is an apocalyptic number.

It is an amenable number.

320333989 is a deficient number, since it is larger than the sum of its proper divisors (1).

320333989 is an equidigital number, since it uses as much as digits as its factorization.

320333989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 40.

The square root of 320333989 is about 17897.8766617719. The cubic root of 320333989 is about 684.2282597450.

The spelling of 320333989 in words is "three hundred twenty million, three hundred thirty-three thousand, nine hundred eighty-nine".