136543081 has 2 divisors, whose sum is σ = 136543082. Its totient is φ = 136543080.

The previous prime is 136543073. The next prime is 136543087. The reversal of 136543081 is 180345631.

136543081 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., 136515856 + 27225 = 11684^2 + 165^2 .

It is a cyclic number.

It is not a de Polignac number, because 136543081 - 2³ = 136543073 is a prime.

It is a super-2 number, since 2×136543081² = 37288025937945122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (136543087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68271540 + 68271541.

It is an arithmetic number, because the mean of its divisors is an integer number (68271541).

Almost surely, 2^136543081 is an apocalyptic number.

It is an amenable number.

136543081 is a deficient number, since it is larger than the sum of its proper divisors (1).

136543081 is an equidigital number, since it uses as much as digits as its factorization.

136543081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 136543081 is about 11685.1649966956. The cubic root of 136543081 is about 514.9399257542.

The spelling of 136543081 in words is "one hundred thirty-six million, five hundred forty-three thousand, eighty-one".