13403209 has 2 divisors, whose sum is σ = 13403210. Its totient is φ = 13403208.

The previous prime is 13403197. The next prime is 13403233. The reversal of 13403209 is 90230431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7997584 + 5405625 = 2828^2 + 2325^2 .

It is an emirp because it is prime and its reverse (90230431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13403209 - 2⁵ = 13403177 is a prime.

It is a super-2 number, since 2×13403209² = 359292022995362, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13403209.

It is not a weakly prime, because it can be changed into another prime (13403239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6701604 + 6701605.

It is an arithmetic number, because the mean of its divisors is an integer number (6701605).

Almost surely, 2^13403209 is an apocalyptic number.

It is an amenable number.

13403209 is a deficient number, since it is larger than the sum of its proper divisors (1).

13403209 is an equidigital number, since it uses as much as digits as its factorization.

13403209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 13403209 is about 3661.0393333041. The cubic root of 13403209 is about 237.5397325954.

The spelling of 13403209 in words is "thirteen million, four hundred three thousand, two hundred nine".