328093391 has 2 divisors, whose sum is σ = 328093392. Its totient is φ = 328093390.

The previous prime is 328093369. The next prime is 328093457. The reversal of 328093391 is 193390823.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-328093391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (328093891) 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, 164046695 + 164046696.

It is an arithmetic number, because the mean of its divisors is an integer number (164046696).

Almost surely, 2^328093391 is an apocalyptic number.

328093391 is a deficient number, since it is larger than the sum of its proper divisors (1).

328093391 is an equidigital number, since it uses as much as digits as its factorization.

328093391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 328093391 is about 18113.3484204329. The cubic root of 328093391 is about 689.7088956166.

The spelling of 328093391 in words is "three hundred twenty-eight million, ninety-three thousand, three hundred ninety-one".