13400443 has 8 divisors (see below), whose sum is σ = 15348960. Its totient is φ = 11460480.

The previous prime is 13400441. The next prime is 13400447. The reversal of 13400443 is 34400431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13400443 - 2¹ = 13400441 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 13400443.

It is not an unprimeable number, because it can be changed into a prime (13400441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1683 + ... + 5443.

It is an arithmetic number, because the mean of its divisors is an integer number (1918620).

Almost surely, 2^13400443 is an apocalyptic number.

13400443 is a deficient number, since it is larger than the sum of its proper divisors (1948517).

13400443 is an equidigital number, since it uses as much as digits as its factorization.

13400443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4277.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 13400443 is about 3660.6615522334. The cubic root of 13400443 is about 237.5233912326.

Adding to 13400443 its reverse (34400431), we get a palindrome (47800874).

The spelling of 13400443 in words is "thirteen million, four hundred thousand, four hundred forty-three".