135663601 has 2 divisors, whose sum is σ = 135663602. Its totient is φ = 135663600.

The previous prime is 135663589. The next prime is 135663617. The reversal of 135663601 is 106366531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90706576 + 44957025 = 9524^2 + 6705^2 .

It is an emirp because it is prime and its reverse (106366531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135663601 - 2⁵ = 135663569 is a prime.

It is a super-2 number, since 2×135663601² = 36809225272574402, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (135663631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67831800 + 67831801.

It is an arithmetic number, because the mean of its divisors is an integer number (67831801).

Almost surely, 2^135663601 is an apocalyptic number.

It is an amenable number.

135663601 is a deficient number, since it is larger than the sum of its proper divisors (1).

135663601 is an equidigital number, since it uses as much as digits as its factorization.

135663601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 135663601 is about 11647.4718716123. The cubic root of 135663601 is about 513.8319599370.

The spelling of 135663601 in words is "one hundred thirty-five million, six hundred sixty-three thousand, six hundred one".