13587987 has 8 divisors (see below), whose sum is σ = 20705536. Its totient is φ = 7764552.

The previous prime is 13587971. The next prime is 13587989. The reversal of 13587987 is 78978531.

13587987 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 13587987 - 2⁴ = 13587971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13587989) 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 7 ways as a sum of consecutive naturals, for example, 323503 + ... + 323544.

It is an arithmetic number, because the mean of its divisors is an integer number (2588192).

Almost surely, 2^13587987 is an apocalyptic number.

13587987 is a deficient number, since it is larger than the sum of its proper divisors (7117549).

13587987 is an equidigital number, since it uses as much as digits as its factorization.

13587987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647057.

The product of its digits is 423360, while the sum is 48.

The square root of 13587987 is about 3686.1886820943. The cubic root of 13587987 is about 238.6263367331.

The spelling of 13587987 in words is "thirteen million, five hundred eighty-seven thousand, nine hundred eighty-seven".