13887287 has 8 divisors (see below), whose sum is σ = 14387712. Its totient is φ = 13390200.

The previous prime is 13887281. The next prime is 13887299. The reversal of 13887287 is 78278831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13887287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13887281) 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, 10112 + ... + 11402.

It is an arithmetic number, because the mean of its divisors is an integer number (1798464).

Almost surely, 2^13887287 is an apocalyptic number.

13887287 is a deficient number, since it is larger than the sum of its proper divisors (500425).

13887287 is a wasteful number, since it uses less digits than its factorization.

13887287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1669.

The product of its digits is 150528, while the sum is 44.

The square root of 13887287 is about 3726.5650403555. The cubic root of 13887287 is about 240.3656867350.

The spelling of 13887287 in words is "thirteen million, eight hundred eighty-seven thousand, two hundred eighty-seven".