173543 has 2 divisors, whose sum is σ = 173544. Its totient is φ = 173542.

The previous prime is 173539. The next prime is 173549. The reversal of 173543 is 345371.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 173543 - 2² = 173539 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (173549) 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, 86771 + 86772.

It is an arithmetic number, because the mean of its divisors is an integer number (86772).

2¹⁷³⁵⁴³ is an apocalyptic number.

173543 is a deficient number, since it is larger than the sum of its proper divisors (1).

173543 is an equidigital number, since it uses as much as digits as its factorization.

173543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1260, while the sum is 23.

The square root of 173543 is about 416.5849253154. The cubic root of 173543 is about 55.7787828877.

It can be divided in two parts, 173 and 543, that multiplied together give a palindrome (93939).

The spelling of 173543 in words is "one hundred seventy-three thousand, five hundred forty-three".