133231187 has 2 divisors, whose sum is σ = 133231188. Its totient is φ = 133231186.

The previous prime is 133231177. The next prime is 133231201. The reversal of 133231187 is 781132331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 133231187 - 2⁴ = 133231171 is a prime.

It is not a weakly prime, because it can be changed into another prime (133231177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66615593 + 66615594.

It is an arithmetic number, because the mean of its divisors is an integer number (66615594).

Almost surely, 2^133231187 is an apocalyptic number.

133231187 is a deficient number, since it is larger than the sum of its proper divisors (1).

133231187 is an equidigital number, since it uses as much as digits as its factorization.

133231187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 29.

The square root of 133231187 is about 11542.5814703644. The cubic root of 133231187 is about 510.7424621021.

The spelling of 133231187 in words is "one hundred thirty-three million, two hundred thirty-one thousand, one hundred eighty-seven".