328609191 has 4 divisors (see below), whose sum is σ = 438145592. Its totient is φ = 219072792.

The previous prime is 328609189. The next prime is 328609223. The reversal of 328609191 is 191906823.

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

It is not a de Polignac number, because 328609191 - 2¹ = 328609189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328619191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54768196 + ... + 54768201.

It is an arithmetic number, because the mean of its divisors is an integer number (109536398).

Almost surely, 2^328609191 is an apocalyptic number.

328609191 is a deficient number, since it is larger than the sum of its proper divisors (109536401).

328609191 is a wasteful number, since it uses less digits than its factorization.

328609191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109536400.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 328609191 is about 18127.5809472748. The cubic root of 328609191 is about 690.0701398978.

The spelling of 328609191 in words is "three hundred twenty-eight million, six hundred nine thousand, one hundred ninety-one".