189380587 has 4 divisors (see below), whose sum is σ = 206597016. Its totient is φ = 172164160.

The previous prime is 189380579. The next prime is 189380591. The reversal of 189380587 is 785083981.

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

It is a cyclic number.

It is not a de Polignac number, because 189380587 - 2³ = 189380579 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 189380587.

It is not an unprimeable number, because it can be changed into a prime (189380537) 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, 8608198 + ... + 8608219.

It is an arithmetic number, because the mean of its divisors is an integer number (51649254).

Almost surely, 2^189380587 is an apocalyptic number.

189380587 is a deficient number, since it is larger than the sum of its proper divisors (17216429).

189380587 is a wasteful number, since it uses less digits than its factorization.

189380587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17216428.

The product of its (nonzero) digits is 483840, while the sum is 49.

The square root of 189380587 is about 13761.5619389661. The cubic root of 189380587 is about 574.2643011843.

The spelling of 189380587 in words is "one hundred eighty-nine million, three hundred eighty thousand, five hundred eighty-seven".