13689706 has 4 divisors (see below), whose sum is σ = 20534562. Its totient is φ = 6844852.

The previous prime is 13689703. The next prime is 13689719. The reversal of 13689706 is 60798631.

13689706 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 13140625 + 549081 = 3625^2 + 741^2 .

It is a super-3 number, since 3×13689706³ (a number of 22 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (13689701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3422425 + ... + 3422428.

Almost surely, 2^13689706 is an apocalyptic number.

13689706 is a deficient number, since it is larger than the sum of its proper divisors (6844856).

13689706 is an equidigital number, since it uses as much as digits as its factorization.

13689706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6844855.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 13689706 is about 3699.9602700570. The cubic root of 13689706 is about 239.2203053757.

The spelling of 13689706 in words is "thirteen million, six hundred eighty-nine thousand, seven hundred six".