189887135 has 8 divisors (see below), whose sum is σ = 227998176. Its totient is φ = 151820640.

The previous prime is 189887123. The next prime is 189887143. The reversal of 189887135 is 531788981.

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

It is not a de Polignac number, because 189887135 - 2⁴ = 189887119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 899 + ... + 19508.

It is an arithmetic number, because the mean of its divisors is an integer number (28499772).

Almost surely, 2^189887135 is an apocalyptic number.

189887135 is a deficient number, since it is larger than the sum of its proper divisors (38111041).

189887135 is a wasteful number, since it uses less digits than its factorization.

189887135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22273.

The product of its digits is 483840, while the sum is 50.

The square root of 189887135 is about 13779.9541000687. The cubic root of 189887135 is about 574.7758521420.

The spelling of 189887135 in words is "one hundred eighty-nine million, eight hundred eighty-seven thousand, one hundred thirty-five".