13875289 has 4 divisors (see below), whose sum is σ = 13927140. Its totient is φ = 13823440.

The previous prime is 13875271. The next prime is 13875299. The reversal of 13875289 is 98257831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98257831 = 7 ⋅14036833.

It can be written as a sum of positive squares in 2 ways, for example, as 369664 + 13505625 = 608^2 + 3675^2 .

It is a cyclic number.

It is not a de Polignac number, because 13875289 - 2⁷ = 13875161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13875209) 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 3 ways as a sum of consecutive naturals, for example, 25522 + ... + 26059.

It is an arithmetic number, because the mean of its divisors is an integer number (3481785).

Almost surely, 2^13875289 is an apocalyptic number.

It is an amenable number.

13875289 is a deficient number, since it is larger than the sum of its proper divisors (51851).

13875289 is an equidigital number, since it uses as much as digits as its factorization.

13875289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51850.

The product of its digits is 120960, while the sum is 43.

The square root of 13875289 is about 3724.9548990558. The cubic root of 13875289 is about 240.2964450266.

The spelling of 13875289 in words is "thirteen million, eight hundred seventy-five thousand, two hundred eighty-nine".