135566953 has 2 divisors, whose sum is σ = 135566954. Its totient is φ = 135566952.

The previous prime is 135566911. The next prime is 135566983. The reversal of 135566953 is 359665531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71774784 + 63792169 = 8472^2 + 7987^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135566953 is a prime.

It is not a weakly prime, because it can be changed into another prime (135566983) 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, 67783476 + 67783477.

It is an arithmetic number, because the mean of its divisors is an integer number (67783477).

Almost surely, 2^135566953 is an apocalyptic number.

It is an amenable number.

135566953 is a deficient number, since it is larger than the sum of its proper divisors (1).

135566953 is an equidigital number, since it uses as much as digits as its factorization.

135566953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 364500, while the sum is 43.

The square root of 135566953 is about 11643.3222492551. The cubic root of 135566953 is about 513.7099114079.

The spelling of 135566953 in words is "one hundred thirty-five million, five hundred sixty-six thousand, nine hundred fifty-three".