13889305 has 8 divisors (see below), whose sum is σ = 16764552. Its totient is φ = 11046528.

The previous prime is 13889279. The next prime is 13889321. The reversal of 13889305 is 50398831.

It can be written as a sum of positive squares in 4 ways, for example, as 3674889 + 10214416 = 1917^2 + 3196^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 13889305 - 2⁷ = 13889177 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7164 + ... + 8893.

It is an arithmetic number, because the mean of its divisors is an integer number (2095569).

Almost surely, 2^13889305 is an apocalyptic number.

It is an amenable number.

13889305 is a deficient number, since it is larger than the sum of its proper divisors (2875247).

13889305 is a wasteful number, since it uses less digits than its factorization.

13889305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16235.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 13889305 is about 3726.8357892453. The cubic root of 13889305 is about 240.3773289049.

The spelling of 13889305 in words is "thirteen million, eight hundred eighty-nine thousand, three hundred five".