13603939 has 4 divisors (see below), whose sum is σ = 13616640. Its totient is φ = 13591240.

The previous prime is 13603937. The next prime is 13603969. The reversal of 13603939 is 93930631.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93930631 = 41 ⋅2290991.

It is a cyclic number.

It is not a de Polignac number, because 13603939 - 2¹ = 13603937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13603937) 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 3 ways as a sum of consecutive naturals, for example, 4579 + ... + 6940.

It is an arithmetic number, because the mean of its divisors is an integer number (3404160).

Almost surely, 2^13603939 is an apocalyptic number.

13603939 is a deficient number, since it is larger than the sum of its proper divisors (12701).

13603939 is a wasteful number, since it uses less digits than its factorization.

13603939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12700.

The product of its (nonzero) digits is 13122, while the sum is 34.

The square root of 13603939 is about 3688.3517999236. The cubic root of 13603939 is about 238.7196809173.

The spelling of 13603939 in words is "thirteen million, six hundred three thousand, nine hundred thirty-nine".