189660895 has 16 divisors (see below), whose sum is σ = 233413632. Its totient is φ = 147893760.

The previous prime is 189660881. The next prime is 189660901. The reversal of 189660895 is 598066981.

It is not a de Polignac number, because 189660895 - 2²⁵ = 156106463 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 15 ways as a sum of consecutive naturals, for example, 31714 + ... + 37216.

It is an arithmetic number, because the mean of its divisors is an integer number (14588352).

Almost surely, 2^189660895 is an apocalyptic number.

189660895 is a deficient number, since it is larger than the sum of its proper divisors (43752737).

189660895 is a wasteful number, since it uses less digits than its factorization.

189660895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5682.

The product of its (nonzero) digits is 933120, while the sum is 52.

The square root of 189660895 is about 13771.7426275690. The cubic root of 189660895 is about 574.5474902310.

The spelling of 189660895 in words is "one hundred eighty-nine million, six hundred sixty thousand, eight hundred ninety-five".