13009609 has 2 divisors, whose sum is σ = 13009610. Its totient is φ = 13009608.

The previous prime is 13009589. The next prime is 13009613. The reversal of 13009609 is 90690031.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7590025 + 5419584 = 2755^2 + 2328^2 .

It is a cyclic number.

It is not a de Polignac number, because 13009609 - 2¹⁹ = 12485321 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13009639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6504804 + 6504805.

It is an arithmetic number, because the mean of its divisors is an integer number (6504805).

Almost surely, 2^13009609 is an apocalyptic number.

It is an amenable number.

13009609 is a deficient number, since it is larger than the sum of its proper divisors (1).

13009609 is an equidigital number, since it uses as much as digits as its factorization.

13009609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 13009609 is about 3606.8835578654. The cubic root of 13009609 is about 235.1913877733.

The spelling of 13009609 in words is "thirteen million, nine thousand, six hundred nine".