133187 has 2 divisors, whose sum is σ = 133188. Its totient is φ = 133186.

The previous prime is 133183. The next prime is 133201. The reversal of 133187 is 781331.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 133187 - 2² = 133183 is a prime.

It is not a weakly prime, because it can be changed into another prime (133183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66593 + 66594.

It is an arithmetic number, because the mean of its divisors is an integer number (66594).

2¹³³¹⁸⁷ is an apocalyptic number.

133187 is a deficient number, since it is larger than the sum of its proper divisors (1).

133187 is an equidigital number, since it uses as much as digits as its factorization.

133187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504, while the sum is 23.

The square root of 133187 is about 364.9479414930. The cubic root of 133187 is about 51.0685992159.

The spelling of 133187 in words is "one hundred thirty-three thousand, one hundred eighty-seven".