133886209 has 2 divisors, whose sum is σ = 133886210. Its totient is φ = 133886208.

The previous prime is 133886201. The next prime is 133886213. The reversal of 133886209 is 902688331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68227600 + 65658609 = 8260^2 + 8103^2 .

It is a cyclic number.

It is not a de Polignac number, because 133886209 - 2³ = 133886201 is a prime.

It is not a weakly prime, because it can be changed into another prime (133886201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66943104 + 66943105.

It is an arithmetic number, because the mean of its divisors is an integer number (66943105).

Almost surely, 2^133886209 is an apocalyptic number.

It is an amenable number.

133886209 is a deficient number, since it is larger than the sum of its proper divisors (1).

133886209 is an equidigital number, since it uses as much as digits as its factorization.

133886209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 133886209 is about 11570.9208363034. The cubic root of 133886209 is about 511.5781042394.

The spelling of 133886209 in words is "one hundred thirty-three million, eight hundred eighty-six thousand, two hundred nine".