13603989 has 8 divisors (see below), whose sum is σ = 20729920. Its totient is φ = 7773696.

The previous prime is 13603979. The next prime is 13604011. The reversal of 13603989 is 98930631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13603989 - 2⁷ = 13603861 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 (13603969) 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 7 ways as a sum of consecutive naturals, for example, 323884 + ... + 323925.

It is an arithmetic number, because the mean of its divisors is an integer number (2591240).

Almost surely, 2^13603989 is an apocalyptic number.

It is an amenable number.

13603989 is a deficient number, since it is larger than the sum of its proper divisors (7125931).

13603989 is an equidigital number, since it uses as much as digits as its factorization.

13603989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647819.

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 13603989 is about 3688.3585780127. The cubic root of 13603989 is about 238.7199733809.

The spelling of 13603989 in words is "thirteen million, six hundred three thousand, nine hundred eighty-nine".