135127217 has 2 divisors, whose sum is σ = 135127218. Its totient is φ = 135127216.

The previous prime is 135127207. The next prime is 135127243. The reversal of 135127217 is 712721531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108076816 + 27050401 = 10396^2 + 5201^2 .

It is a cyclic number.

It is not a de Polignac number, because 135127217 - 2²² = 130932913 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 135127217.

It is not a weakly prime, because it can be changed into another prime (135127207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67563608 + 67563609.

It is an arithmetic number, because the mean of its divisors is an integer number (67563609).

Almost surely, 2^135127217 is an apocalyptic number.

It is an amenable number.

135127217 is a deficient number, since it is larger than the sum of its proper divisors (1).

135127217 is an equidigital number, since it uses as much as digits as its factorization.

135127217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2940, while the sum is 29.

The square root of 135127217 is about 11624.4232975232. The cubic root of 135127217 is about 513.1538726797.

Adding to 135127217 its reverse (712721531), we get a palindrome (847848748).

The spelling of 135127217 in words is "one hundred thirty-five million, one hundred twenty-seven thousand, two hundred seventeen".