13333409 has 2 divisors, whose sum is σ = 13333410. Its totient is φ = 13333408.

The previous prime is 13333403. The next prime is 13333427. The reversal of 13333409 is 90433331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8248384 + 5085025 = 2872^2 + 2255^2 .

It is a cyclic number.

It is not a de Polignac number, because 13333409 - 2⁸ = 13333153 is a prime.

It is a super-2 number, since 2×13333409² = 355559591122562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13333403) 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, 6666704 + 6666705.

It is an arithmetic number, because the mean of its divisors is an integer number (6666705).

Almost surely, 2^13333409 is an apocalyptic number.

It is an amenable number.

13333409 is a deficient number, since it is larger than the sum of its proper divisors (1).

13333409 is an equidigital number, since it uses as much as digits as its factorization.

13333409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 26.

The square root of 13333409 is about 3651.4940777715. The cubic root of 13333409 is about 237.1266688623.

The spelling of 13333409 in words is "thirteen million, three hundred thirty-three thousand, four hundred nine".