13604403 has 16 divisors (see below), whose sum is σ = 19525536. Its totient is φ = 8394240.

The previous prime is 13604401. The next prime is 13604407. The reversal of 13604403 is 30440631.

It is not a de Polignac number, because 13604403 - 2¹ = 13604401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13604403.

It is not an unprimeable number, because it can be changed into a prime (13604401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 925 + ... + 5297.

It is an arithmetic number, because the mean of its divisors is an integer number (1220346).

Almost surely, 2^13604403 is an apocalyptic number.

13604403 is a deficient number, since it is larger than the sum of its proper divisors (5921133).

13604403 is a wasteful number, since it uses less digits than its factorization.

13604403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4454.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 13604403 is about 3688.4147001117. The cubic root of 13604403 is about 238.7223949517.

The spelling of 13604403 in words is "thirteen million, six hundred four thousand, four hundred three".