170843 has 2 divisors, whose sum is σ = 170844. Its totient is φ = 170842.

The previous prime is 170837. The next prime is 170851. The reversal of 170843 is 348071.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 170843 - 2⁴ = 170827 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (170813) 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, 85421 + 85422.

It is an arithmetic number, because the mean of its divisors is an integer number (85422).

2¹⁷⁰⁸⁴³ is an apocalyptic number.

170843 is a deficient number, since it is larger than the sum of its proper divisors (1).

170843 is an equidigital number, since it uses as much as digits as its factorization.

170843 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 170843 is about 413.3315860178. The cubic root of 170843 is about 55.4879989202.

Subtracting from 170843 its sum of digits (23), we obtain a triangular number (170820 = T₅₈₄).

The spelling of 170843 in words is "one hundred seventy thousand, eight hundred forty-three".