189679985 has 16 divisors (see below), whose sum is σ = 252521280. Its totient is φ = 135608640.

The previous prime is 189679967. The next prime is 189679993. The reversal of 189679985 is 589976981.

189679985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 189679985 - 2¹⁴ = 189663601 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25982 + ... + 32471.

It is an arithmetic number, because the mean of its divisors is an integer number (15782580).

Almost surely, 2^189679985 is an apocalyptic number.

It is an amenable number.

189679985 is a deficient number, since it is larger than the sum of its proper divisors (62841295).

189679985 is a wasteful number, since it uses less digits than its factorization.

189679985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58528.

The product of its digits is 9797760, while the sum is 62.

The square root of 189679985 is about 13772.4356959835. The cubic root of 189679985 is about 574.5667662897.

The spelling of 189679985 in words is "one hundred eighty-nine million, six hundred seventy-nine thousand, nine hundred eighty-five".