135648817 has 2 divisors, whose sum is σ = 135648818. Its totient is φ = 135648816.

The previous prime is 135648719. The next prime is 135648823. The reversal of 135648817 is 718846531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135117376 + 531441 = 11624^2 + 729^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135648817 is a prime.

It is not a weakly prime, because it can be changed into another prime (135648217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67824408 + 67824409.

It is an arithmetic number, because the mean of its divisors is an integer number (67824409).

Almost surely, 2^135648817 is an apocalyptic number.

It is an amenable number.

135648817 is a deficient number, since it is larger than the sum of its proper divisors (1).

135648817 is an equidigital number, since it uses as much as digits as its factorization.

135648817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 43.

The square root of 135648817 is about 11646.8372101614. The cubic root of 135648817 is about 513.8132942385.

The spelling of 135648817 in words is "one hundred thirty-five million, six hundred forty-eight thousand, eight hundred seventeen".