328365091 has 4 divisors (see below), whose sum is σ = 328716472. Its totient is φ = 328013712.

The previous prime is 328365083. The next prime is 328365127. The reversal of 328365091 is 190563823.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 328365091 - 2³ = 328365083 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 328365091.

It is not an unprimeable number, because it can be changed into a prime (328365041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174285 + ... + 176158.

It is an arithmetic number, because the mean of its divisors is an integer number (82179118).

Almost surely, 2^328365091 is an apocalyptic number.

328365091 is a deficient number, since it is larger than the sum of its proper divisors (351381).

328365091 is an equidigital number, since it uses as much as digits as its factorization.

328365091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351380.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 328365091 is about 18120.8468621088. The cubic root of 328365091 is about 689.8992298403.

The spelling of 328365091 in words is "three hundred twenty-eight million, three hundred sixty-five thousand, ninety-one".