320331337 has 2 divisors, whose sum is σ = 320331338. Its totient is φ = 320331336.

The previous prime is 320331307. The next prime is 320331371. The reversal of 320331337 is 733133023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205176976 + 115154361 = 14324^2 + 10731^2 .

It is a cyclic number.

It is not a de Polignac number, because 320331337 - 2¹⁹ = 319807049 is a prime.

It is a super-2 number, since 2×320331337² = 205224330928415138, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (320331307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160165668 + 160165669.

It is an arithmetic number, because the mean of its divisors is an integer number (160165669).

Almost surely, 2^320331337 is an apocalyptic number.

It is an amenable number.

320331337 is a deficient number, since it is larger than the sum of its proper divisors (1).

320331337 is an equidigital number, since it uses as much as digits as its factorization.

320331337 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3402, while the sum is 25.

The square root of 320331337 is about 17897.8025746179. The cubic root of 320331337 is about 684.2263715300.

The spelling of 320331337 in words is "three hundred twenty million, three hundred thirty-one thousand, three hundred thirty-seven".