13438609 has 2 divisors, whose sum is σ = 13438610. Its totient is φ = 13438608.

The previous prime is 13438603. The next prime is 13438637. The reversal of 13438609 is 90683431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8910225 + 4528384 = 2985^2 + 2128^2 .

It is a cyclic number.

It is not a de Polignac number, because 13438609 - 2⁵ = 13438577 is a prime.

It is not a weakly prime, because it can be changed into another prime (13438603) 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 as a sum of consecutive naturals, namely, 6719304 + 6719305.

It is an arithmetic number, because the mean of its divisors is an integer number (6719305).

Almost surely, 2^13438609 is an apocalyptic number.

It is an amenable number.

13438609 is a deficient number, since it is larger than the sum of its proper divisors (1).

13438609 is an equidigital number, since it uses as much as digits as its factorization.

13438609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 13438609 is about 3665.8708378774. The cubic root of 13438609 is about 237.7486754511.

The spelling of 13438609 in words is "thirteen million, four hundred thirty-eight thousand, six hundred nine".