13878589 has 4 divisors (see below), whose sum is σ = 14253724. Its totient is φ = 13503456.

The previous prime is 13878563. The next prime is 13878619. The reversal of 13878589 is 98587831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11799225 + 2079364 = 3435^2 + 1442^2 .

It is a cyclic number.

It is not a de Polignac number, because 13878589 - 2⁷ = 13878461 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 (13878509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187512 + ... + 187585.

It is an arithmetic number, because the mean of its divisors is an integer number (3563431).

Almost surely, 2^13878589 is an apocalyptic number.

It is an amenable number.

13878589 is a deficient number, since it is larger than the sum of its proper divisors (375135).

13878589 is an equidigital number, since it uses as much as digits as its factorization.

13878589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375134.

The product of its digits is 483840, while the sum is 49.

The square root of 13878589 is about 3725.3978311048. The cubic root of 13878589 is about 240.3154936487.

The spelling of 13878589 in words is "thirteen million, eight hundred seventy-eight thousand, five hundred eighty-nine".