136181081 has 2 divisors, whose sum is σ = 136181082. Its totient is φ = 136181080.

The previous prime is 136181063. The next prime is 136181117. The reversal of 136181081 is 180181631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71233600 + 64947481 = 8440^2 + 8059^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136181081 is a prime.

It is a super-2 number, since 2×136181081² = 37090573644657122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (136181041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68090540 + 68090541.

It is an arithmetic number, because the mean of its divisors is an integer number (68090541).

Almost surely, 2^136181081 is an apocalyptic number.

It is an amenable number.

136181081 is a deficient number, since it is larger than the sum of its proper divisors (1).

136181081 is an equidigital number, since it uses as much as digits as its factorization.

136181081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 136181081 is about 11669.6649909070. The cubic root of 136181081 is about 514.4844572221.

The spelling of 136181081 in words is "one hundred thirty-six million, one hundred eighty-one thousand, eighty-one".