33804809 has 2 divisors, whose sum is σ = 33804810. Its totient is φ = 33804808.

The previous prime is 33804739. The next prime is 33804833. The reversal of 33804809 is 90840833.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33582025 + 222784 = 5795^2 + 472^2 .

It is an emirp because it is prime and its reverse (90840833) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 33804809 - 2¹² = 33800713 is a prime.

It is a super-2 number, since 2×33804809² = 2285530223052962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (33804839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16902404 + 16902405.

It is an arithmetic number, because the mean of its divisors is an integer number (16902405).

Almost surely, 2^33804809 is an apocalyptic number.

It is an amenable number.

33804809 is a deficient number, since it is larger than the sum of its proper divisors (1).

33804809 is an equidigital number, since it uses as much as digits as its factorization.

33804809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 33804809 is about 5814.1903133626. The cubic root of 33804809 is about 323.3400457978.

The spelling of 33804809 in words is "thirty-three million, eight hundred four thousand, eight hundred nine".