133130237 has 2 divisors, whose sum is σ = 133130238. Its totient is φ = 133130236.

The previous prime is 133130203. The next prime is 133130251. The reversal of 133130237 is 732031331.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71334916 + 61795321 = 8446^2 + 7861^2 .

It is a cyclic number.

It is not a de Polignac number, because 133130237 - 2¹⁸ = 132868093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133130287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66565118 + 66565119.

It is an arithmetic number, because the mean of its divisors is an integer number (66565119).

Almost surely, 2^133130237 is an apocalyptic number.

It is an amenable number.

133130237 is a deficient number, since it is larger than the sum of its proper divisors (1).

133130237 is an equidigital number, since it uses as much as digits as its factorization.

133130237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 23.

The square root of 133130237 is about 11538.2077031054. The cubic root of 133130237 is about 510.6134320542.

Adding to 133130237 its reverse (732031331), we get a palindrome (865161568).

The spelling of 133130237 in words is "one hundred thirty-three million, one hundred thirty thousand, two hundred thirty-seven".