13443123 has 4 divisors (see below), whose sum is σ = 17924168. Its totient is φ = 8962080.

The previous prime is 13443113. The next prime is 13443137. The reversal of 13443123 is 32134431.

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

It is not a de Polignac number, because 13443123 - 2¹³ = 13434931 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13443123.

It is not an unprimeable number, because it can be changed into a prime (13443103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2240518 + ... + 2240523.

It is an arithmetic number, because the mean of its divisors is an integer number (4481042).

Almost surely, 2^13443123 is an apocalyptic number.

13443123 is a deficient number, since it is larger than the sum of its proper divisors (4481045).

13443123 is an equidigital number, since it uses as much as digits as its factorization.

13443123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4481044.

The product of its digits is 864, while the sum is 21.

The square root of 13443123 is about 3666.4864652689. The cubic root of 13443123 is about 237.7752922282.

Adding to 13443123 its reverse (32134431), we get a palindrome (45577554).

The spelling of 13443123 in words is "thirteen million, four hundred forty-three thousand, one hundred twenty-three".