136686049 has 2 divisors, whose sum is σ = 136686050. Its totient is φ = 136686048.

The previous prime is 136686013. The next prime is 136686059. The reversal of 136686049 is 940686631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124211025 + 12475024 = 11145^2 + 3532^2 .

It is a cyclic number.

It is not a de Polignac number, because 136686049 - 2⁹ = 136685537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 136685996 and 136686014.

It is not a weakly prime, because it can be changed into another prime (136686059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68343024 + 68343025.

It is an arithmetic number, because the mean of its divisors is an integer number (68343025).

Almost surely, 2^136686049 is an apocalyptic number.

It is an amenable number.

136686049 is a deficient number, since it is larger than the sum of its proper divisors (1).

136686049 is an equidigital number, since it uses as much as digits as its factorization.

136686049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 136686049 is about 11691.2808964630. The cubic root of 136686049 is about 515.1195863932.

The spelling of 136686049 in words is "one hundred thirty-six million, six hundred eighty-six thousand, forty-nine".