33097909 has 4 divisors (see below), whose sum is σ = 35643916. Its totient is φ = 30551904.

The previous prime is 33097891. The next prime is 33097921. The reversal of 33097909 is 90979033.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90979033 = 1109 ⋅82037.

It can be written as a sum of positive squares in 2 ways, for example, as 4774225 + 28323684 = 2185^2 + 5322^2 .

It is a cyclic number.

It is not a de Polignac number, because 33097909 - 2⁵ = 33097877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33097969) 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 in 3 ways as a sum of consecutive naturals, for example, 1272984 + ... + 1273009.

It is an arithmetic number, because the mean of its divisors is an integer number (8910979).

Almost surely, 2^33097909 is an apocalyptic number.

It is an amenable number.

33097909 is a deficient number, since it is larger than the sum of its proper divisors (2546007).

33097909 is a wasteful number, since it uses less digits than its factorization.

33097909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2546006.

The product of its (nonzero) digits is 45927, while the sum is 40.

The square root of 33097909 is about 5753.0782195274. The cubic root of 33097909 is about 321.0703384582.

The spelling of 33097909 in words is "thirty-three million, ninety-seven thousand, nine hundred nine".