136018261 has 2 divisors, whose sum is σ = 136018262. Its totient is φ = 136018260.

The previous prime is 136018229. The next prime is 136018273. The reversal of 136018261 is 162810631.

136018261 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., 132480100 + 3538161 = 11510^2 + 1881^2 .

It is a cyclic number.

It is not a de Polignac number, because 136018261 - 2⁵ = 136018229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136013261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68009130 + 68009131.

It is an arithmetic number, because the mean of its divisors is an integer number (68009131).

Almost surely, 2^136018261 is an apocalyptic number.

It is an amenable number.

136018261 is a deficient number, since it is larger than the sum of its proper divisors (1).

136018261 is an equidigital number, since it uses as much as digits as its factorization.

136018261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 136018261 is about 11662.6866973266. The cubic root of 136018261 is about 514.2793338531.

Adding to 136018261 its reverse (162810631), we get a palindrome (298828892).

The spelling of 136018261 in words is "one hundred thirty-six million, eighteen thousand, two hundred sixty-one".