13643389 has 4 divisors (see below), whose sum is σ = 13656924. Its totient is φ = 13629856.

The previous prime is 13643353. The next prime is 13643407. The reversal of 13643389 is 98334631.

13643389 is digitally balanced in base 3, 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 an emirpimes, since its reverse is a distinct semiprime: 98334631 = 191 ⋅514841.

It can be written as a sum of positive squares in 2 ways, for example, as 1844164 + 11799225 = 1358^2 + 3435^2 .

It is a cyclic number.

It is not a de Polignac number, because 13643389 - 2⁷ = 13643261 is a prime.

It is a super-2 number, since 2×13643389² = 372284126810642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13643339) 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, 5122 + ... + 7315.

It is an arithmetic number, because the mean of its divisors is an integer number (3414231).

Almost surely, 2^13643389 is an apocalyptic number.

It is an amenable number.

13643389 is a deficient number, since it is larger than the sum of its proper divisors (13535).

13643389 is a wasteful number, since it uses less digits than its factorization.

13643389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13534.

The product of its digits is 46656, while the sum is 37.

The square root of 13643389 is about 3693.6958456267. The cubic root of 13643389 is about 238.9502122559.

It can be divided in two parts, 1364 and 3389, that added together give a triangular number (4753 = T₉₇).

The spelling of 13643389 in words is "thirteen million, six hundred forty-three thousand, three hundred eighty-nine".