13687494 has 8 divisors (see below), whose sum is σ = 27375000. Its totient is φ = 4562496.

The previous prime is 13687493. The next prime is 13687529. The reversal of 13687494 is 49478631.

13687494 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

13687494 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13687493) 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, 1140619 + ... + 1140630.

It is an arithmetic number, because the mean of its divisors is an integer number (3421875).

Almost surely, 2^13687494 is an apocalyptic number.

13687494 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13687494 is a wasteful number, since it uses less digits than its factorization.

13687494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2281254.

The product of its digits is 145152, while the sum is 42.

The square root of 13687494 is about 3699.6613358522. The cubic root of 13687494 is about 239.2074201753.

The spelling of 13687494 in words is "thirteen million, six hundred eighty-seven thousand, four hundred ninety-four".