13440343 has 4 divisors (see below), whose sum is σ = 15360400. Its totient is φ = 11520288.

The previous prime is 13440341. The next prime is 13440379. The reversal of 13440343 is 34304431.

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 13440343 - 2¹ = 13440341 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 (13440341) 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, 960018 + ... + 960031.

It is an arithmetic number, because the mean of its divisors is an integer number (3840100).

Almost surely, 2^13440343 is an apocalyptic number.

13440343 is a deficient number, since it is larger than the sum of its proper divisors (1920057).

13440343 is an equidigital number, since it uses as much as digits as its factorization.

13440343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1920056.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 13440343 is about 3666.1073361264. The cubic root of 13440343 is about 237.7589006779.

Adding to 13440343 its reverse (34304431), we get a palindrome (47744774).

The spelling of 13440343 in words is "thirteen million, four hundred forty thousand, three hundred forty-three".