13607989 has 4 divisors (see below), whose sum is σ = 14077260. Its totient is φ = 13138720.

The previous prime is 13607981. The next prime is 13608013. The reversal of 13607989 is 98970631.

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 11675889 + 1932100 = 3417^2 + 1390^2 .

It is a cyclic number.

It is not a de Polignac number, because 13607989 - 2³ = 13607981 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 (13607981) 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 3 ways as a sum of consecutive naturals, for example, 234592 + ... + 234649.

It is an arithmetic number, because the mean of its divisors is an integer number (3519315).

Almost surely, 2^13607989 is an apocalyptic number.

It is an amenable number.

13607989 is a deficient number, since it is larger than the sum of its proper divisors (469271).

13607989 is an equidigital number, since it uses as much as digits as its factorization.

13607989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469270.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 13607989 is about 3688.9007847867. The cubic root of 13607989 is about 238.7433681445.

The spelling of 13607989 in words is "thirteen million, six hundred seven thousand, nine hundred eighty-nine".