135140861 has 2 divisors, whose sum is σ = 135140862. Its totient is φ = 135140860.

The previous prime is 135140851. The next prime is 135140869. The reversal of 135140861 is 168041531.

135140861 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., 101384761 + 33756100 = 10069^2 + 5810^2 .

It is a cyclic number.

It is not a de Polignac number, because 135140861 - 2¹⁴ = 135124477 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_7653062 and since 135140861 and 7653062 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135140869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67570430 + 67570431.

It is an arithmetic number, because the mean of its divisors is an integer number (67570431).

Almost surely, 2^135140861 is an apocalyptic number.

It is an amenable number.

135140861 is a deficient number, since it is larger than the sum of its proper divisors (1).

135140861 is an equidigital number, since it uses as much as digits as its factorization.

135140861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 135140861 is about 11625.0101505332. The cubic root of 135140861 is about 513.1711434067.

The spelling of 135140861 in words is "one hundred thirty-five million, one hundred forty thousand, eight hundred sixty-one".