13989309 has 8 divisors (see below), whose sum is σ = 18756192. Its totient is φ = 9274320.

The previous prime is 13989289. The next prime is 13989337. The reversal of 13989309 is 90398931.

It is a happy number.

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

It is not a de Polignac number, because 13989309 - 2¹⁷ = 13858237 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13989379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12339 + ... + 13424.

It is an arithmetic number, because the mean of its divisors is an integer number (2344524).

Almost surely, 2^13989309 is an apocalyptic number.

It is an amenable number.

13989309 is a deficient number, since it is larger than the sum of its proper divisors (4766883).

13989309 is a wasteful number, since it uses less digits than its factorization.

13989309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25947.

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 13989309 is about 3740.2284689575. The cubic root of 13989309 is about 240.9528611970.

The spelling of 13989309 in words is "thirteen million, nine hundred eighty-nine thousand, three hundred nine".