168971 has 4 divisors (see below), whose sum is σ = 184344. Its totient is φ = 153600.

The previous prime is 168943. The next prime is 168977. The reversal of 168971 is 179861.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7670 + ... + 7691.

It is an arithmetic number, because the mean of its divisors is an integer number (46086).

2¹⁶⁸⁹⁷¹ is an apocalyptic number.

168971 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

168971 is a deficient number, since it is larger than the sum of its proper divisors (15373).

168971 is a wasteful number, since it uses less digits than its factorization.

168971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15372.

The product of its digits is 3024, while the sum is 32.

The square root of 168971 is about 411.0608227501. The cubic root of 168971 is about 55.2845855403.

The spelling of 168971 in words is "one hundred sixty-eight thousand, nine hundred seventy-one".