13681587 has 8 divisors (see below), whose sum is σ = 18492304. Its totient is φ = 8995968.

The previous prime is 13681541. The next prime is 13681589. The reversal of 13681587 is 78518631.

13681587 is digitally balanced in base 2, 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 13681587 - 2¹¹ = 13679539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13681589) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31018 + ... + 31455.

It is an arithmetic number, because the mean of its divisors is an integer number (2311538).

Almost surely, 2^13681587 is an apocalyptic number.

13681587 is a deficient number, since it is larger than the sum of its proper divisors (4810717).

13681587 is an equidigital number, since it uses as much as digits as its factorization.

13681587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62549.

The product of its digits is 40320, while the sum is 39.

The square root of 13681587 is about 3698.8629333891. The cubic root of 13681587 is about 239.1730042930.

The spelling of 13681587 in words is "thirteen million, six hundred eighty-one thousand, five hundred eighty-seven".