191985 has 8 divisors (see below), whose sum is σ = 307200. Its totient is φ = 102384.

The previous prime is 191977. The next prime is 191999. The reversal of 191985 is 589191.

191985 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 191985 - 2³ = 191977 is a prime.

191985 is strictly pandigital in base 7.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 191985.

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, 6385 + ... + 6414.

It is an arithmetic number, because the mean of its divisors is an integer number (38400).

2¹⁹¹⁹⁸⁵ is an apocalyptic number.

191985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

191985 is a deficient number, since it is larger than the sum of its proper divisors (115215).

191985 is a wasteful number, since it uses less digits than its factorization.

191985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12807.

The product of its digits is 3240, while the sum is 33.

The square root of 191985 is about 438.1609293399. The cubic root of 191985 is about 57.6884804299.

It can be divided in two parts, 191 and 985, that added together give a triangular number (1176 = T₄₈).

The spelling of 191985 in words is "one hundred ninety-one thousand, nine hundred eighty-five".