133138133 has 2 divisors, whose sum is σ = 133138134. Its totient is φ = 133138132.

The previous prime is 133138129. The next prime is 133138141. The reversal of 133138133 is 331831331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104387089 + 28751044 = 10217^2 + 5362^2 .

It is a cyclic number.

It is not a de Polignac number, because 133138133 - 2² = 133138129 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133138123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66569066 + 66569067.

It is an arithmetic number, because the mean of its divisors is an integer number (66569067).

Almost surely, 2^133138133 is an apocalyptic number.

It is an amenable number.

133138133 is a deficient number, since it is larger than the sum of its proper divisors (1).

133138133 is an equidigital number, since it uses as much as digits as its factorization.

133138133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 26.

The square root of 133138133 is about 11538.5498655594. The cubic root of 133138133 is about 510.6235267405.

Adding to 133138133 its reverse (331831331), we get a palindrome (464969464).

The spelling of 133138133 in words is "one hundred thirty-three million, one hundred thirty-eight thousand, one hundred thirty-three".