13727987 has 24 divisors (see below), whose sum is σ = 17964576. Its totient is φ = 10378368.

The previous prime is 13727981. The next prime is 13728037. The reversal of 13727987 is 78972731.

It is not a de Polignac number, because 13727987 - 2⁴ = 13727971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13727981) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14183 + ... + 15119.

It is an arithmetic number, because the mean of its divisors is an integer number (748524).

Almost surely, 2^13727987 is an apocalyptic number.

13727987 is a deficient number, since it is larger than the sum of its proper divisors (4236589).

13727987 is a wasteful number, since it uses less digits than its factorization.

13727987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987 (or 980 counting only the distinct ones).

The product of its digits is 148176, while the sum is 44.

The square root of 13727987 is about 3705.1298222869. The cubic root of 13727987 is about 239.4430778698.

The spelling of 13727987 in words is "thirteen million, seven hundred twenty-seven thousand, nine hundred eighty-seven".