171116986 has 8 divisors (see below), whose sum is σ = 256731840. Its totient is φ = 85539708.

The previous prime is 171116977. The next prime is 171116999. The reversal of 171116986 is 689611171.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10005 + ... + 21031.

It is an arithmetic number, because the mean of its divisors is an integer number (32091480).

Almost surely, 2^171116986 is an apocalyptic number.

171116986 is a deficient number, since it is larger than the sum of its proper divisors (85614854).

171116986 is a wasteful number, since it uses less digits than its factorization.

171116986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18788.

The product of its digits is 18144, while the sum is 40.

The square root of 171116986 is about 13081.1691373516. The cubic root of 171116986 is about 555.1764566204.

The spelling of 171116986 in words is "one hundred seventy-one million, one hundred sixteen thousand, nine hundred eighty-six".