33009409 has 2 divisors, whose sum is σ = 33009410. Its totient is φ = 33009408.

The previous prime is 33009401. The next prime is 33009443. The reversal of 33009409 is 90490033.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19847025 + 13162384 = 4455^2 + 3628^2 .

It is a cyclic number.

It is not a de Polignac number, because 33009409 - 2³ = 33009401 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (33009401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16504704 + 16504705.

It is an arithmetic number, because the mean of its divisors is an integer number (16504705).

Almost surely, 2^33009409 is an apocalyptic number.

It is an amenable number.

33009409 is a deficient number, since it is larger than the sum of its proper divisors (1).

33009409 is an equidigital number, since it uses as much as digits as its factorization.

33009409 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 28.

The square root of 33009409 is about 5745.3815365039. The cubic root of 33009409 is about 320.7839146386.

The spelling of 33009409 in words is "thirty-three million, nine thousand, four hundred nine".