13629987 has 36 divisors (see below), whose sum is σ = 23664576. Its totient is φ = 7529760.

The previous prime is 13629929. The next prime is 13629989. The reversal of 13629987 is 78992631.

13629987 is a `hidden beast` number, since 13 + 629 + 9 + 8 + 7 = 666.

It is not a de Polignac number, because 13629987 - 2¹⁰ = 13628963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13629989) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 13173 + ... + 14169.

Almost surely, 2^13629987 is an apocalyptic number.

13629987 is a deficient number, since it is larger than the sum of its proper divisors (10034589).

13629987 is a wasteful number, since it uses less digits than its factorization.

13629987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048 (or 1038 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 13629987 is about 3691.8812277753. The cubic root of 13629987 is about 238.8719457807.

The spelling of 13629987 in words is "thirteen million, six hundred twenty-nine thousand, nine hundred eighty-seven".