13603439 has 4 divisors (see below), whose sum is σ = 13693680. Its totient is φ = 13513200.

The previous prime is 13603423. The next prime is 13603459. The reversal of 13603439 is 93430631.

13603439 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93430631 = 7 ⋅13347233.

It is a cyclic number.

It is not a de Polignac number, because 13603439 - 2⁴ = 13603423 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 (13603409) 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, 44894 + ... + 45195.

It is an arithmetic number, because the mean of its divisors is an integer number (3423420).

Almost surely, 2^13603439 is an apocalyptic number.

13603439 is a deficient number, since it is larger than the sum of its proper divisors (90241).

13603439 is an equidigital number, since it uses as much as digits as its factorization.

13603439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90240.

The product of its (nonzero) digits is 5832, while the sum is 29.

The square root of 13603439 is about 3688.2840183478. The cubic root of 13603439 is about 238.7167562423.

The spelling of 13603439 in words is "thirteen million, six hundred three thousand, four hundred thirty-nine".