33690109 has 4 divisors (see below), whose sum is σ = 33747516. Its totient is φ = 33632704.

The previous prime is 33690089. The next prime is 33690119. The reversal of 33690109 is 90109633.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90109633 = 4517 ⋅19949.

It can be written as a sum of positive squares in 2 ways, for example, as 28836900 + 4853209 = 5370^2 + 2203^2 .

It is a cyclic number.

It is not a de Polignac number, because 33690109 - 2⁵ = 33690077 is a prime.

It is a super-2 number, since 2×33690109² = 2270046888863762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33690119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27814 + ... + 28999.

It is an arithmetic number, because the mean of its divisors is an integer number (8436879).

Almost surely, 2^33690109 is an apocalyptic number.

It is an amenable number.

33690109 is a deficient number, since it is larger than the sum of its proper divisors (57407).

33690109 is an equidigital number, since it uses as much as digits as its factorization.

33690109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57406.

The product of its (nonzero) digits is 4374, while the sum is 31.

The square root of 33690109 is about 5804.3181339413. The cubic root of 33690109 is about 322.9739329160.

The spelling of 33690109 in words is "thirty-three million, six hundred ninety thousand, one hundred nine".