84168191 has 4 divisors (see below), whose sum is σ = 84283752. Its totient is φ = 84052632.

The previous prime is 84168143. The next prime is 84168199. The reversal of 84168191 is 19186148.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 84168191 - 2²⁶ = 17059327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84168199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56681 + ... + 58146.

It is an arithmetic number, because the mean of its divisors is an integer number (21070938).

Almost surely, 2^84168191 is an apocalyptic number.

84168191 is a deficient number, since it is larger than the sum of its proper divisors (115561).

84168191 is a wasteful number, since it uses less digits than its factorization.

84168191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115560.

The product of its digits is 13824, while the sum is 38.

The square root of 84168191 is about 9174.3223727968. The cubic root of 84168191 is about 438.2440189998.

The spelling of 84168191 in words is "eighty-four million, one hundred sixty-eight thousand, one hundred ninety-one".