13533989 has 8 divisors (see below), whose sum is σ = 16377408. Its totient is φ = 10918080.

The previous prime is 13533983. The next prime is 13533991. The reversal of 13533989 is 98933531.

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

It is not a de Polignac number, because 13533989 - 2⁴ = 13533973 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 (13533983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56747 + ... + 56984.

It is an arithmetic number, because the mean of its divisors is an integer number (2047176).

Almost surely, 2^13533989 is an apocalyptic number.

It is an amenable number.

13533989 is a deficient number, since it is larger than the sum of its proper divisors (2843419).

13533989 is a wasteful number, since it uses less digits than its factorization.

13533989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113755.

The product of its digits is 87480, while the sum is 41.

The square root of 13533989 is about 3678.8570235876. The cubic root of 13533989 is about 238.3098206003.

The spelling of 13533989 in words is "thirteen million, five hundred thirty-three thousand, nine hundred eighty-nine".