328643197 has 2 divisors, whose sum is σ = 328643198. Its totient is φ = 328643196.

The previous prime is 328643143. The next prime is 328643207. The reversal of 328643197 is 791346823.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166564836 + 162078361 = 12906^2 + 12731^2 .

It is an emirp because it is prime and its reverse (791346823) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 328643197 - 2¹¹ = 328641149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (328643897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164321598 + 164321599.

It is an arithmetic number, because the mean of its divisors is an integer number (164321599).

Almost surely, 2^328643197 is an apocalyptic number.

It is an amenable number.

328643197 is a deficient number, since it is larger than the sum of its proper divisors (1).

328643197 is an equidigital number, since it uses as much as digits as its factorization.

328643197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 43.

The square root of 328643197 is about 18128.5188859984. The cubic root of 328643197 is about 690.0939429608.

The spelling of 328643197 in words is "three hundred twenty-eight million, six hundred forty-three thousand, one hundred ninety-seven".