13320409 has 2 divisors, whose sum is σ = 13320410. Its totient is φ = 13320408.

The previous prime is 13320397. The next prime is 13320431. The reversal of 13320409 is 90402331.

It is an a-pointer prime, because the next prime (13320431) can be obtained adding 13320409 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12054784 + 1265625 = 3472^2 + 1125^2 .

It is a cyclic number.

It is not a de Polignac number, because 13320409 - 2⁹ = 13319897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13320409.

It is not a weakly prime, because it can be changed into another prime (13320479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6660204 + 6660205.

It is an arithmetic number, because the mean of its divisors is an integer number (6660205).

Almost surely, 2^13320409 is an apocalyptic number.

It is an amenable number.

13320409 is a deficient number, since it is larger than the sum of its proper divisors (1).

13320409 is an equidigital number, since it uses as much as digits as its factorization.

13320409 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 13320409 is about 3649.7135504036. The cubic root of 13320409 is about 237.0495780724.

The spelling of 13320409 in words is "thirteen million, three hundred twenty thousand, four hundred nine".