161943 has 8 divisors (see below), whose sum is σ = 225408. Its totient is φ = 103224.

The previous prime is 161923. The next prime is 161947. The reversal of 161943 is 349161.

161943 is nontrivially palindromic in base 6.

161943 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161943 - 2⁵ = 161911 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

161943 is strictly pandigital in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1105 + ... + 1242.

It is an arithmetic number, because the mean of its divisors is an integer number (28176).

2¹⁶¹⁹⁴³ is an apocalyptic number.

161943 is a deficient number, since it is larger than the sum of its proper divisors (63465).

161943 is a wasteful number, since it uses less digits than its factorization.

161943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2373.

The product of its digits is 648, while the sum is 24.

The square root of 161943 is about 402.4214209010. The cubic root of 161943 is about 54.5072234625.

The spelling of 161943 in words is "one hundred sixty-one thousand, nine hundred forty-three".