109243 has 4 divisors (see below), whose sum is σ = 113040. Its totient is φ = 105448.

The previous prime is 109229. The next prime is 109253. The reversal of 109243 is 342901.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 109243 - 2⁵ = 109211 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 15 and base 16.

It is a nialpdrome in base 7.

It is a self number, because there is not a number n which added to its sum of digits gives 109243.

It is not an unprimeable number, because it can be changed into a prime (109253) 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 in 3 ways as a sum of consecutive naturals, for example, 1855 + ... + 1912.

It is an arithmetic number, because the mean of its divisors is an integer number (28260).

2¹⁰⁹²⁴³ is an apocalyptic number.

109243 is a deficient number, since it is larger than the sum of its proper divisors (3797).

109243 is an equidigital number, since it uses as much as digits as its factorization.

109243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3796.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 109243 is about 330.5192883933. The cubic root of 109243 is about 47.8040332025.

The spelling of 109243 in words is "one hundred nine thousand, two hundred forty-three".