100043243 has 4 divisors (see below), whose sum is σ = 103493040. Its totient is φ = 96593448.

The previous prime is 100043221. The next prime is 100043263. The reversal of 100043243 is 342340001.

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 100043243 - 2¹⁶ = 99977707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100043263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1724855 + ... + 1724912.

It is an arithmetic number, because the mean of its divisors is an integer number (25873260).

Almost surely, 2^100043243 is an apocalyptic number.

100043243 is a deficient number, since it is larger than the sum of its proper divisors (3449797).

100043243 is an equidigital number, since it uses as much as digits as its factorization.

100043243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3449796.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 100043243 is about 10002.1619163059. The cubic root of 100043243 is about 464.2257791283.

Adding to 100043243 its reverse (342340001), we get a palindrome (442383244).

The spelling of 100043243 in words is "one hundred million, forty-three thousand, two hundred forty-three".