109443 has 6 divisors (see below), whose sum is σ = 146692. Its totient is φ = 72580.

The previous prime is 109441. The next prime is 109451. The reversal of 109443 is 344901.

It is not a de Polignac number, because 109443 - 2¹ = 109441 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 109443.

It is not an unprimeable number, because it can be changed into a prime (109441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 478 + ... + 668.

2¹⁰⁹⁴⁴³ is an apocalyptic number.

109443 is a deficient number, since it is larger than the sum of its proper divisors (37249).

109443 is an frugal number, since it uses more digits than its factorization.

109443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 109443 is about 330.8217042457. The cubic root of 109443 is about 47.8331883215.

Multiplying 109443 by its product of nonzero digits (432), we get a square (47279376 = 6876²).

It can be divided in two parts, 10 and 9443, that added together give a triangular number (9453 = T₁₃₇).

The spelling of 109443 in words is "one hundred nine thousand, four hundred forty-three".