33972109 has 4 divisors (see below), whose sum is σ = 34024320. Its totient is φ = 33919900.

The previous prime is 33972091. The next prime is 33972143. The reversal of 33972109 is 90127933.

33972109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90127933 = 7 ⋅12875419.

It is a cyclic number.

It is not a de Polignac number, because 33972109 - 2⁵ = 33972077 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 (33972509) 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, 25117 + ... + 26434.

It is an arithmetic number, because the mean of its divisors is an integer number (8506080).

Almost surely, 2^33972109 is an apocalyptic number.

It is an amenable number.

33972109 is a deficient number, since it is larger than the sum of its proper divisors (52211).

33972109 is an equidigital number, since it uses as much as digits as its factorization.

33972109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52210.

The product of its (nonzero) digits is 10206, while the sum is 34.

The square root of 33972109 is about 5828.5597706466. The cubic root of 33972109 is about 323.8725715679.

The spelling of 33972109 in words is "thirty-three million, nine hundred seventy-two thousand, one hundred nine".