328189397 has 2 divisors, whose sum is σ = 328189398. Its totient is φ = 328189396.

The previous prime is 328189363. The next prime is 328189399. The reversal of 328189397 is 793981823.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 325658116 + 2531281 = 18046^2 + 1591^2 .

It is a cyclic number.

It is not a de Polignac number, because 328189397 - 2¹⁸ = 327927253 is a prime.

Together with 328189399, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (328189399) 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, 164094698 + 164094699.

It is an arithmetic number, because the mean of its divisors is an integer number (164094699).

Almost surely, 2^328189397 is an apocalyptic number.

It is an amenable number.

328189397 is a deficient number, since it is larger than the sum of its proper divisors (1).

328189397 is an equidigital number, since it uses as much as digits as its factorization.

328189397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 50.

The square root of 328189397 is about 18115.9983716051. The cubic root of 328189397 is about 689.7761627794.

The spelling of 328189397 in words is "three hundred twenty-eight million, one hundred eighty-nine thousand, three hundred ninety-seven".