13400403 has 16 divisors (see below), whose sum is σ = 19109376. Its totient is φ = 8323200.

The previous prime is 13400389. The next prime is 13400417. The reversal of 13400403 is 30400431.

It is an interprime number because it is at equal distance from previous prime (13400389) and next prime (13400417).

It is not a de Polignac number, because 13400403 - 2⁵ = 13400371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13400483) 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 15 ways as a sum of consecutive naturals, for example, 3978 + ... + 6528.

It is an arithmetic number, because the mean of its divisors is an integer number (1194336).

Almost surely, 2^13400403 is an apocalyptic number.

13400403 is a deficient number, since it is larger than the sum of its proper divisors (5708973).

13400403 is a wasteful number, since it uses less digits than its factorization.

13400403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2674.

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

The square root of 13400403 is about 3660.6560887360. The cubic root of 13400403 is about 237.5231548985.

Adding to 13400403 its reverse (30400431), we get a palindrome (43800834).

The spelling of 13400403 in words is "thirteen million, four hundred thousand, four hundred three".