135382217 has 2 divisors, whose sum is σ = 135382218. Its totient is φ = 135382216.

The previous prime is 135382183. The next prime is 135382243. The reversal of 135382217 is 712283531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79192201 + 56190016 = 8899^2 + 7496^2 .

It is an emirp because it is prime and its reverse (712283531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135382217 - 2¹² = 135378121 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (135382417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67691108 + 67691109.

It is an arithmetic number, because the mean of its divisors is an integer number (67691109).

Almost surely, 2^135382217 is an apocalyptic number.

It is an amenable number.

135382217 is a deficient number, since it is larger than the sum of its proper divisors (1).

135382217 is an equidigital number, since it uses as much as digits as its factorization.

135382217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 32.

The square root of 135382217 is about 11635.3864138670. The cubic root of 135382217 is about 513.4764625435.

The spelling of 135382217 in words is "one hundred thirty-five million, three hundred eighty-two thousand, two hundred seventeen".