13723861 has 4 divisors (see below), whose sum is σ = 13734252. Its totient is φ = 13713472.

The previous prime is 13723819. The next prime is 13723867. The reversal of 13723861 is 16832731.

13723861 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, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 8910225 + 4813636 = 2985^2 + 2194^2 .

It is a cyclic number.

It is not a de Polignac number, because 13723861 - 2⁷ = 13723733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13723867) 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, 2866 + ... + 5971.

It is an arithmetic number, because the mean of its divisors is an integer number (3433563).

Almost surely, 2^13723861 is an apocalyptic number.

It is an amenable number.

13723861 is a deficient number, since it is larger than the sum of its proper divisors (10391).

13723861 is an equidigital number, since it uses as much as digits as its factorization.

13723861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10390.

The product of its digits is 6048, while the sum is 31.

The square root of 13723861 is about 3704.5729848391. The cubic root of 13723861 is about 239.4190869494.

The spelling of 13723861 in words is "thirteen million, seven hundred twenty-three thousand, eight hundred sixty-one".