13722689 has 4 divisors (see below), whose sum is σ = 14529924. Its totient is φ = 12915456.

The previous prime is 13722679. The next prime is 13722691. The reversal of 13722689 is 98622731.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7924225 + 5798464 = 2815^2 + 2408^2 .

It is a cyclic number.

It is not a de Polignac number, because 13722689 - 2⁴ = 13722673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13722629) 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, 403592 + ... + 403625.

It is an arithmetic number, because the mean of its divisors is an integer number (3632481).

Almost surely, 2^13722689 is an apocalyptic number.

It is an amenable number.

13722689 is a deficient number, since it is larger than the sum of its proper divisors (807235).

13722689 is an equidigital number, since it uses as much as digits as its factorization.

13722689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807234.

The product of its digits is 36288, while the sum is 38.

The square root of 13722689 is about 3704.4147985883. The cubic root of 13722689 is about 239.4122713951.

The spelling of 13722689 in words is "thirteen million, seven hundred twenty-two thousand, six hundred eighty-nine".