13440609 has 24 divisors (see below), whose sum is σ = 23895872. Its totient is φ = 7089120.

The previous prime is 13440607. The next prime is 13440617. The reversal of 13440609 is 90604431.

13440609 is a `hidden beast` number, since 13 + 4 + 40 + 609 = 666.

13440609 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13440609 - 2¹ = 13440607 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (13440607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7387 + ... + 9024.

Almost surely, 2^13440609 is an apocalyptic number.

It is an amenable number.

13440609 is a deficient number, since it is larger than the sum of its proper divisors (10455263).

13440609 is a wasteful number, since it uses less digits than its factorization.

13440609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16437 (or 16434 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 13440609 is about 3666.1436142083. The cubic root of 13440609 is about 237.7604691758.

The spelling of 13440609 in words is "thirteen million, four hundred forty thousand, six hundred nine".