12513209 has 2 divisors, whose sum is σ = 12513210. Its totient is φ = 12513208.

The previous prime is 12513203. The next prime is 12513227. The reversal of 12513209 is 90231521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7997584 + 4515625 = 2828^2 + 2125^2 .

It is a cyclic number.

It is not a de Polignac number, because 12513209 - 2⁸ = 12512953 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12513203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6256604 + 6256605.

It is an arithmetic number, because the mean of its divisors is an integer number (6256605).

Almost surely, 2^12513209 is an apocalyptic number.

It is an amenable number.

12513209 is a deficient number, since it is larger than the sum of its proper divisors (1).

12513209 is an equidigital number, since it uses as much as digits as its factorization.

12513209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 12513209 is about 3537.4014473904. The cubic root of 12513209 is about 232.1611605653.

The spelling of 12513209 in words is "twelve million, five hundred thirteen thousand, two hundred nine".