13440003 has 4 divisors (see below), whose sum is σ = 17920008. Its totient is φ = 8960000.

The previous prime is 13440001. The next prime is 13440041. The reversal of 13440003 is 30004431.

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 13440003 - 2¹ = 13440001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13440001) 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, 2239998 + ... + 2240003.

It is an arithmetic number, because the mean of its divisors is an integer number (4480002).

Almost surely, 2^13440003 is an apocalyptic number.

13440003 is a deficient number, since it is larger than the sum of its proper divisors (4480005).

13440003 is an equidigital number, since it uses as much as digits as its factorization.

13440003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4480004.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 13440003 is about 3666.0609651232. The cubic root of 13440003 is about 237.7568958008.

Adding to 13440003 its reverse (30004431), we get a palindrome (43444434).

The spelling of 13440003 in words is "thirteen million, four hundred forty thousand, three".