13579309 has 2 divisors, whose sum is σ = 13579310. Its totient is φ = 13579308.

The previous prime is 13579273. The next prime is 13579331. The reversal of 13579309 is 90397531.

13579309 is nontrivially palindromic in base 11.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11764900 + 1814409 = 3430^2 + 1347^2 .

It is a cyclic number.

It is not a de Polignac number, because 13579309 - 2⁹ = 13578797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13579339) 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 as a sum of consecutive naturals, namely, 6789654 + 6789655.

It is an arithmetic number, because the mean of its divisors is an integer number (6789655).

Almost surely, 2^13579309 is an apocalyptic number.

It is an amenable number.

13579309 is a deficient number, since it is larger than the sum of its proper divisors (1).

13579309 is an equidigital number, since it uses as much as digits as its factorization.

13579309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25515, while the sum is 37.

The square root of 13579309 is about 3685.0113975400. The cubic root of 13579309 is about 238.5755261569.

The spelling of 13579309 in words is "thirteen million, five hundred seventy-nine thousand, three hundred nine".