135771761 has 2 divisors, whose sum is σ = 135771762. Its totient is φ = 135771760.

The previous prime is 135771733. The next prime is 135771781. The reversal of 135771761 is 167177531.

135771761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123654400 + 12117361 = 11120^2 + 3481^2 .

It is an emirp because it is prime and its reverse (167177531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135771761 - 2¹⁴ = 135755377 is a prime.

It is a super-2 number, since 2×135771761² = 36867942170082242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (135771721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67885880 + 67885881.

It is an arithmetic number, because the mean of its divisors is an integer number (67885881).

Almost surely, 2^135771761 is an apocalyptic number.

It is an amenable number.

135771761 is a deficient number, since it is larger than the sum of its proper divisors (1).

135771761 is an equidigital number, since it uses as much as digits as its factorization.

135771761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30870, while the sum is 38.

The square root of 135771761 is about 11652.1140142036. The cubic root of 135771761 is about 513.9684772767.

The spelling of 135771761 in words is "one hundred thirty-five million, seven hundred seventy-one thousand, seven hundred sixty-one".