13238009 has 2 divisors, whose sum is σ = 13238010. Its totient is φ = 13238008.

The previous prime is 13237997. The next prime is 13238011. The reversal of 13238009 is 90083231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13162384 + 75625 = 3628^2 + 275^2 .

It is a cyclic number.

It is not a de Polignac number, because 13238009 - 2¹⁶ = 13172473 is a prime.

Together with 13238011, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13238509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6619004 + 6619005.

It is an arithmetic number, because the mean of its divisors is an integer number (6619005).

Almost surely, 2^13238009 is an apocalyptic number.

It is an amenable number.

13238009 is a deficient number, since it is larger than the sum of its proper divisors (1).

13238009 is an equidigital number, since it uses as much as digits as its factorization.

13238009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 13238009 is about 3638.4074813028. The cubic root of 13238009 is about 236.5597707647.

The spelling of 13238009 in words is "thirteen million, two hundred thirty-eight thousand, nine".