13678487 has 4 divisors (see below), whose sum is σ = 13687320. Its totient is φ = 13669656.

The previous prime is 13678481. The next prime is 13678507. The reversal of 13678487 is 78487631.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 78487631 = 1091 ⋅71941.

It is a cyclic number.

It is not a de Polignac number, because 13678487 - 2¹⁰ = 13677463 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 (13678481) 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, 1412 + ... + 5417.

It is an arithmetic number, because the mean of its divisors is an integer number (3421830).

Almost surely, 2^13678487 is an apocalyptic number.

13678487 is a deficient number, since it is larger than the sum of its proper divisors (8833).

13678487 is an equidigital number, since it uses as much as digits as its factorization.

13678487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8832.

The product of its digits is 225792, while the sum is 44.

The square root of 13678487 is about 3698.4438619506. The cubic root of 13678487 is about 239.1549388371.

The spelling of 13678487 in words is "thirteen million, six hundred seventy-eight thousand, four hundred eighty-seven".