190328321 has 4 divisors (see below), whose sum is σ = 190394544. Its totient is φ = 190262100.

The previous prime is 190328267. The next prime is 190328323. The reversal of 190328321 is 123823091.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 190328321 - 2²² = 186134017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190328323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28595 + ... + 34616.

It is an arithmetic number, because the mean of its divisors is an integer number (47598636).

Almost surely, 2^190328321 is an apocalyptic number.

It is an amenable number.

190328321 is a deficient number, since it is larger than the sum of its proper divisors (66223).

190328321 is an equidigital number, since it uses as much as digits as its factorization.

190328321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66222.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 190328321 is about 13795.9530660263. The cubic root of 190328321 is about 575.2206548219.

The spelling of 190328321 in words is "one hundred ninety million, three hundred twenty-eight thousand, three hundred twenty-one".