13837987 has 6 divisors (see below), whose sum is σ = 14003228. Its totient is φ = 13674672.

The previous prime is 13837981. The next prime is 13838021. The reversal of 13837987 is 78973831.

It is a happy number.

13837987 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 13837987 - 2¹⁵ = 13805219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13837981) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7048 + ... + 8794.

Almost surely, 2^13837987 is an apocalyptic number.

13837987 is a deficient number, since it is larger than the sum of its proper divisors (165241).

13837987 is an frugal number, since it uses more digits than its factorization.

13837987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1925 (or 1836 counting only the distinct ones).

The product of its digits is 254016, while the sum is 46.

The square root of 13837987 is about 3719.9444888331. The cubic root of 13837987 is about 240.0809160031.

The spelling of 13837987 in words is "thirteen million, eight hundred thirty-seven thousand, nine hundred eighty-seven".