13687406 has 4 divisors (see below), whose sum is σ = 20531112. Its totient is φ = 6843702.

The previous prime is 13687403. The next prime is 13687411. The reversal of 13687406 is 60478631.

It is a semiprime because it is the product of two primes.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3421850 + ... + 3421853.

It is an arithmetic number, because the mean of its divisors is an integer number (5132778).

Almost surely, 2^13687406 is an apocalyptic number.

13687406 is a deficient number, since it is larger than the sum of its proper divisors (6843706).

13687406 is an equidigital number, since it uses as much as digits as its factorization.

13687406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6843705.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 13687406 is about 3699.6494428527. The cubic root of 13687406 is about 239.2069075346.

The spelling of 13687406 in words is "thirteen million, six hundred eighty-seven thousand, four hundred six".