13604429 has 4 divisors (see below), whose sum is σ = 13641276. Its totient is φ = 13567584.

The previous prime is 13604413. The next prime is 13604441. The reversal of 13604429 is 92440631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92440631 = 193 ⋅478967.

It can be written as a sum of positive squares in 2 ways, for example, as 6325225 + 7279204 = 2515^2 + 2698^2 .

It is a cyclic number.

It is not a de Polignac number, because 13604429 - 2⁴ = 13604413 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 (13604449) 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, 17864 + ... + 18609.

It is an arithmetic number, because the mean of its divisors is an integer number (3410319).

Almost surely, 2^13604429 is an apocalyptic number.

It is an amenable number.

13604429 is a deficient number, since it is larger than the sum of its proper divisors (36847).

13604429 is an equidigital number, since it uses as much as digits as its factorization.

13604429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36846.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 13604429 is about 3688.4182246595. The cubic root of 13604429 is about 238.7225470293.

The spelling of 13604429 in words is "thirteen million, six hundred four thousand, four hundred twenty-nine".