133235209 has 4 divisors (see below), whose sum is σ = 133350160. Its totient is φ = 133120260.

The previous prime is 133235189. The next prime is 133235231. The reversal of 133235209 is 902532331.

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: 902532331 = 619 ⋅1458049.

It is a cyclic number.

It is not a de Polignac number, because 133235209 - 2¹¹ = 133233161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133235279) 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, 55719 + ... + 58060.

It is an arithmetic number, because the mean of its divisors is an integer number (33337540).

Almost surely, 2^133235209 is an apocalyptic number.

It is an amenable number.

133235209 is a deficient number, since it is larger than the sum of its proper divisors (114951).

133235209 is a wasteful number, since it uses less digits than its factorization.

133235209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114950.

The product of its (nonzero) digits is 4860, while the sum is 28.

The square root of 133235209 is about 11542.7556935075. The cubic root of 133235209 is about 510.7476015032.

The spelling of 133235209 in words is "one hundred thirty-three million, two hundred thirty-five thousand, two hundred nine".