166843 has 2 divisors, whose sum is σ = 166844. Its totient is φ = 166842.

The previous prime is 166841. The next prime is 166847. The reversal of 166843 is 348661.

It is a weak prime.

It is an emirp because it is prime and its reverse (348661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166843 - 2¹ = 166841 is a prime.

Together with 166841, it forms a pair of twin primes.

It is a plaindrome in base 15 and base 16.

It is not a weakly prime, because it can be changed into another prime (166841) 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 as a sum of consecutive naturals, namely, 83421 + 83422.

It is an arithmetic number, because the mean of its divisors is an integer number (83422).

2¹⁶⁶⁸⁴³ is an apocalyptic number.

166843 is a deficient number, since it is larger than the sum of its proper divisors (1).

166843 is an equidigital number, since it uses as much as digits as its factorization.

166843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 28.

The square root of 166843 is about 408.4641967174. The cubic root of 166843 is about 55.0515219690.

It can be divided in two parts, 1668 and 43, that added together give a triangular number (1711 = T₅₈).

The spelling of 166843 in words is "one hundred sixty-six thousand, eight hundred forty-three".