13445689 has 4 divisors (see below), whose sum is σ = 13809124. Its totient is φ = 13082256.

The previous prime is 13445683. The next prime is 13445717. The reversal of 13445689 is 98654431.

13445689 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 2 ways, for example, as 6290064 + 7155625 = 2508^2 + 2675^2 .

It is a cyclic number.

It is not a de Polignac number, because 13445689 - 2⁷ = 13445561 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (13445683) 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, 181662 + ... + 181735.

It is an arithmetic number, because the mean of its divisors is an integer number (3452281).

Almost surely, 2^13445689 is an apocalyptic number.

It is an amenable number.

13445689 is a deficient number, since it is larger than the sum of its proper divisors (363435).

13445689 is an equidigital number, since it uses as much as digits as its factorization.

13445689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363434.

The product of its digits is 103680, while the sum is 40.

The square root of 13445689 is about 3666.8363748605. The cubic root of 13445689 is about 237.7904199775.

The spelling of 13445689 in words is "thirteen million, four hundred forty-five thousand, six hundred eighty-nine".