133126657 has 2 divisors, whose sum is σ = 133126658. Its totient is φ = 133126656.

The previous prime is 133126639. The next prime is 133126661. The reversal of 133126657 is 756621331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116553616 + 16573041 = 10796^2 + 4071^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133126657 is a prime.

It is not a weakly prime, because it can be changed into another prime (133126627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66563328 + 66563329.

It is an arithmetic number, because the mean of its divisors is an integer number (66563329).

Almost surely, 2^133126657 is an apocalyptic number.

It is an amenable number.

133126657 is a deficient number, since it is larger than the sum of its proper divisors (1).

133126657 is an equidigital number, since it uses as much as digits as its factorization.

133126657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 34.

The square root of 133126657 is about 11538.0525653162. The cubic root of 133126657 is about 510.6088550512.

Adding to 133126657 its reverse (756621331), we get a palindrome (889747988).

The spelling of 133126657 in words is "one hundred thirty-three million, one hundred twenty-six thousand, six hundred fifty-seven".