189326521 has 8 divisors (see below), whose sum is σ = 194948360. Its totient is φ = 183731328.

The previous prime is 189326513. The next prime is 189326531. The reversal of 189326521 is 125623981.

189326521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 94848121 + 94478400 = 9739^2 + 9720^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 189326521 - 2³ = 189326513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189326531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8245 + ... + 21133.

It is an arithmetic number, because the mean of its divisors is an integer number (24368545).

Almost surely, 2^189326521 is an apocalyptic number.

It is an amenable number.

189326521 is a deficient number, since it is larger than the sum of its proper divisors (5621839).

189326521 is a wasteful number, since it uses less digits than its factorization.

189326521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13323.

The product of its digits is 25920, while the sum is 37.

The square root of 189326521 is about 13759.5974141688. The cubic root of 189326521 is about 574.2096473445.

The spelling of 189326521 in words is "one hundred eighty-nine million, three hundred twenty-six thousand, five hundred twenty-one".