189528013 has 4 divisors (see below), whose sum is σ = 189657468. Its totient is φ = 189398560.

The previous prime is 189528011. The next prime is 189528041. The reversal of 189528013 is 310825981.

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

It can be written as a sum of positive squares in 2 ways, for example, as 130576329 + 58951684 = 11427^2 + 7678^2 .

It is a cyclic number.

It is not a de Polignac number, because 189528013 - 2¹ = 189528011 is a prime.

It is a super-5 number, since 5×189528013⁵ (a number of 43 digits) contains 55555 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189528011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62506 + ... + 65467.

It is an arithmetic number, because the mean of its divisors is an integer number (47414367).

Almost surely, 2^189528013 is an apocalyptic number.

It is an amenable number.

189528013 is a deficient number, since it is larger than the sum of its proper divisors (129455).

189528013 is a wasteful number, since it uses less digits than its factorization.

189528013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129454.

The product of its (nonzero) digits is 17280, while the sum is 37.

The square root of 189528013 is about 13766.9173383151. The cubic root of 189528013 is about 574.4132772595.

The spelling of 189528013 in words is "one hundred eighty-nine million, five hundred twenty-eight thousand, thirteen".