168871191 has 8 divisors (see below), whose sum is σ = 230398080. Its totient is φ = 109962552.

The previous prime is 168871189. The next prime is 168871207. The reversal of 168871191 is 191178861.

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

It is not a de Polignac number, because 168871191 - 2¹ = 168871189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168871151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 654411 + ... + 654668.

It is an arithmetic number, because the mean of its divisors is an integer number (28799760).

Almost surely, 2^168871191 is an apocalyptic number.

168871191 is a deficient number, since it is larger than the sum of its proper divisors (61526889).

168871191 is a wasteful number, since it uses less digits than its factorization.

168871191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1309125.

The product of its digits is 24192, while the sum is 42.

The square root of 168871191 is about 12995.0448633316. The cubic root of 168871191 is about 552.7369809808.

The spelling of 168871191 in words is "one hundred sixty-eight million, eight hundred seventy-one thousand, one hundred ninety-one".