13722609 has 8 divisors (see below), whose sum is σ = 18340992. Its totient is φ = 9126320.

The previous prime is 13722581. The next prime is 13722623. The reversal of 13722609 is 90622731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13722609 - 2⁹ = 13722097 is a prime.

It is a super-3 number, since 3×13722609³ (a number of 22 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (13722629) 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 in 7 ways as a sum of consecutive naturals, for example, 4014 + ... + 6599.

It is an arithmetic number, because the mean of its divisors is an integer number (2292624).

Almost surely, 2^13722609 is an apocalyptic number.

It is an amenable number.

13722609 is a deficient number, since it is larger than the sum of its proper divisors (4618383).

13722609 is a wasteful number, since it uses less digits than its factorization.

13722609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11047.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 13722609 is about 3704.4040006457. The cubic root of 13722609 is about 239.4118061554.

The spelling of 13722609 in words is "thirteen million, seven hundred twenty-two thousand, six hundred nine".