13558609 has 4 divisors (see below), whose sum is σ = 14272240. Its totient is φ = 12844980.

The previous prime is 13558591. The next prime is 13558621. The reversal of 13558609 is 90685531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13558609 - 2⁷ = 13558481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13558669) 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, 356787 + ... + 356824.

It is an arithmetic number, because the mean of its divisors is an integer number (3568060).

Almost surely, 2^13558609 is an apocalyptic number.

13558609 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

13558609 is a deficient number, since it is larger than the sum of its proper divisors (713631).

13558609 is an equidigital number, since it uses as much as digits as its factorization.

13558609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713630.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 13558609 is about 3682.2016511864. The cubic root of 13558609 is about 238.4542380780.

The spelling of 13558609 in words is "thirteen million, five hundred fifty-eight thousand, six hundred nine".