13209143 has 4 divisors (see below), whose sum is σ = 13313280. Its totient is φ = 13105008.

The previous prime is 13209139. The next prime is 13209151. The reversal of 13209143 is 34190231.

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 13209143 - 2² = 13209139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13209173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51878 + ... + 52131.

It is an arithmetic number, because the mean of its divisors is an integer number (3328320).

Almost surely, 2^13209143 is an apocalyptic number.

13209143 is a deficient number, since it is larger than the sum of its proper divisors (104137).

13209143 is a wasteful number, since it uses less digits than its factorization.

13209143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104136.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 13209143 is about 3634.4384710709. The cubic root of 13209143 is about 236.3877030049.

Adding to 13209143 its reverse (34190231), we get a palindrome (47399374).

The spelling of 13209143 in words is "thirteen million, two hundred nine thousand, one hundred forty-three".