190328521 has 4 divisors (see below), whose sum is σ = 194378112. Its totient is φ = 186278932.

The previous prime is 190328507. The next prime is 190328539. The reversal of 190328521 is 125823091.

190328521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 125823091 = 127 ⋅990733.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190328521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190320521) 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, 2024725 + ... + 2024818.

It is an arithmetic number, because the mean of its divisors is an integer number (48594528).

Almost surely, 2^190328521 is an apocalyptic number.

It is an amenable number.

190328521 is a deficient number, since it is larger than the sum of its proper divisors (4049591).

190328521 is an equidigital number, since it uses as much as digits as its factorization.

190328521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4049590.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 190328521 is about 13795.9603145269. The cubic root of 190328521 is about 575.2208563055.

The spelling of 190328521 in words is "one hundred ninety million, three hundred twenty-eight thousand, five hundred twenty-one".