13665289 has 8 divisors (see below), whose sum is σ = 15556032. Its totient is φ = 11882640.

The previous prime is 13665283. The next prime is 13665307. The reversal of 13665289 is 98256631.

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

It is not a de Polignac number, because 13665289 - 2⁵ = 13665257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13665283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26754 + ... + 27259.

It is an arithmetic number, because the mean of its divisors is an integer number (1944504).

Almost surely, 2^13665289 is an apocalyptic number.

It is an amenable number.

13665289 is a deficient number, since it is larger than the sum of its proper divisors (1890743).

13665289 is a wasteful number, since it uses less digits than its factorization.

13665289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54047.

The product of its digits is 77760, while the sum is 40.

The square root of 13665289 is about 3696.6591674105. The cubic root of 13665289 is about 239.0779960536.

The spelling of 13665289 in words is "thirteen million, six hundred sixty-five thousand, two hundred eighty-nine".