133233209 has 2 divisors, whose sum is σ = 133233210. Its totient is φ = 133233208.

The previous prime is 133233197. The next prime is 133233223. The reversal of 133233209 is 902332331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127057984 + 6175225 = 11272^2 + 2485^2 .

It is a cyclic number.

It is not a de Polignac number, because 133233209 - 2¹² = 133229113 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (133233229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66616604 + 66616605.

It is an arithmetic number, because the mean of its divisors is an integer number (66616605).

Almost surely, 2^133233209 is an apocalyptic number.

It is an amenable number.

133233209 is a deficient number, since it is larger than the sum of its proper divisors (1).

133233209 is an equidigital number, since it uses as much as digits as its factorization.

133233209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 26.

The square root of 133233209 is about 11542.6690587576. The cubic root of 133233209 is about 510.7450458716.

The spelling of 133233209 in words is "one hundred thirty-three million, two hundred thirty-three thousand, two hundred nine".