191386085 has 32 divisors (see below), whose sum is σ = 267898752. Its totient is φ = 129710080.

The previous prime is 191386057. The next prime is 191386093. The reversal of 191386085 is 580683191.

191386085 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 191386085 - 2¹⁴ = 191369701 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99089 + ... + 101001.

It is an arithmetic number, because the mean of its divisors is an integer number (8371836).

Almost surely, 2^191386085 is an apocalyptic number.

It is an amenable number.

191386085 is a deficient number, since it is larger than the sum of its proper divisors (76512667).

191386085 is a wasteful number, since it uses less digits than its factorization.

191386085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2053.

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 191386085 is about 13834.2359745669. The cubic root of 191386085 is about 576.2842975494.

The spelling of 191386085 in words is "one hundred ninety-one million, three hundred eighty-six thousand, eighty-five".