13866287 has 4 divisors (see below), whose sum is σ = 13932216. Its totient is φ = 13800360.

The previous prime is 13866283. The next prime is 13866313. The reversal of 13866287 is 78266831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78266831 = 1039 ⋅75329.

It is a cyclic number.

It is not a de Polignac number, because 13866287 - 2² = 13866283 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 (13866283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32648 + ... + 33069.

It is an arithmetic number, because the mean of its divisors is an integer number (3483054).

Almost surely, 2^13866287 is an apocalyptic number.

13866287 is a deficient number, since it is larger than the sum of its proper divisors (65929).

13866287 is an equidigital number, since it uses as much as digits as its factorization.

13866287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65928.

The product of its digits is 96768, while the sum is 41.

The square root of 13866287 is about 3723.7463662285. The cubic root of 13866287 is about 240.2444673328.

The spelling of 13866287 in words is "thirteen million, eight hundred sixty-six thousand, two hundred eighty-seven".