13687407 has 8 divisors (see below), whose sum is σ = 20277680. Its totient is φ = 9124920.

The previous prime is 13687403. The next prime is 13687411. The reversal of 13687407 is 70478631.

13687407 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13687403) and next prime (13687411).

It is not a de Polignac number, because 13687407 - 2² = 13687403 is a prime.

It is a super-2 number, since 2×13687407² = 374690220767298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13687403) 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, 253444 + ... + 253497.

It is an arithmetic number, because the mean of its divisors is an integer number (2534710).

Almost surely, 2^13687407 is an apocalyptic number.

13687407 is a deficient number, since it is larger than the sum of its proper divisors (6590273).

13687407 is an equidigital number, since it uses as much as digits as its factorization.

13687407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506950 (or 506944 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 13687407 is about 3699.6495780006. The cubic root of 13687407 is about 239.2069133601.

The spelling of 13687407 in words is "thirteen million, six hundred eighty-seven thousand, four hundred seven".