13687907 has 6 divisors (see below), whose sum is σ = 14540748. Its totient is φ = 12882464.

The previous prime is 13687903. The next prime is 13687909. The reversal of 13687907 is 70978631.

13687907 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13687907 - 2² = 13687903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13687901) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23393 + ... + 23970.

It is an arithmetic number, because the mean of its divisors is an integer number (2423458).

Almost surely, 2^13687907 is an apocalyptic number.

13687907 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

13687907 is a deficient number, since it is larger than the sum of its proper divisors (852841).

13687907 is an equidigital number, since it uses as much as digits as its factorization.

13687907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47397 (or 47380 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 13687907 is about 3699.7171513509. The cubic root of 13687907 is about 239.2098260618.

The spelling of 13687907 in words is "thirteen million, six hundred eighty-seven thousand, nine hundred seven".