163943 has 4 divisors (see below), whose sum is σ = 176568. Its totient is φ = 151320.

The previous prime is 163927. The next prime is 163973. The reversal of 163943 is 349361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 349361 = 41 ⋅8521.

It is not a de Polignac number, because 163943 - 2⁴ = 163927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163973) 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, 6293 + ... + 6318.

It is an arithmetic number, because the mean of its divisors is an integer number (44142).

2¹⁶³⁹⁴³ is an apocalyptic number.

163943 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

163943 is a deficient number, since it is larger than the sum of its proper divisors (12625).

163943 is a wasteful number, since it uses less digits than its factorization.

163943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12624.

The product of its digits is 1944, while the sum is 26.

The square root of 163943 is about 404.8987527765. The cubic root of 163943 is about 54.7306945272.

The spelling of 163943 in words is "one hundred sixty-three thousand, nine hundred forty-three".