13671987 has 16 divisors (see below), whose sum is σ = 20931840. Its totient is φ = 7775712.

The previous prime is 13671967. The next prime is 13671989. The reversal of 13671987 is 78917631.

13671987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13671987 - 2¹¹ = 13669939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13671989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3388 + ... + 6230.

It is an arithmetic number, because the mean of its divisors is an integer number (1308240).

Almost surely, 2^13671987 is an apocalyptic number.

13671987 is a deficient number, since it is larger than the sum of its proper divisors (7259853).

13671987 is a wasteful number, since it uses less digits than its factorization.

13671987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3082.

The product of its digits is 63504, while the sum is 42.

The square root of 13671987 is about 3697.5650095705. The cubic root of 13671987 is about 239.1170507919.

The spelling of 13671987 in words is "thirteen million, six hundred seventy-one thousand, nine hundred eighty-seven".