33938809 has 4 divisors (see below), whose sum is σ = 34268416. Its totient is φ = 33609204.

The previous prime is 33938803. The next prime is 33938819. The reversal of 33938809 is 90883933.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 33938809 - 2¹⁷ = 33807737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33938803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164649 + ... + 164854.

It is an arithmetic number, because the mean of its divisors is an integer number (8567104).

Almost surely, 2^33938809 is an apocalyptic number.

It is an amenable number.

33938809 is a deficient number, since it is larger than the sum of its proper divisors (329607).

33938809 is a wasteful number, since it uses less digits than its factorization.

33938809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329606.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 33938809 is about 5825.7024469157. The cubic root of 33938809 is about 323.7667152960.

The spelling of 33938809 in words is "thirty-three million, nine hundred thirty-eight thousand, eight hundred nine".