136869169 has 2 divisors, whose sum is σ = 136869170. Its totient is φ = 136869168.

The previous prime is 136869163. The next prime is 136869197. The reversal of 136869169 is 961968631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134838544 + 2030625 = 11612^2 + 1425^2 .

It is a cyclic number.

It is not a de Polignac number, because 136869169 - 2⁵ = 136869137 is a prime.

It is a super-2 number, since 2×136869169² = 37466338845501122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (136869163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68434584 + 68434585.

It is an arithmetic number, because the mean of its divisors is an integer number (68434585).

Almost surely, 2^136869169 is an apocalyptic number.

It is an amenable number.

136869169 is a deficient number, since it is larger than the sum of its proper divisors (1).

136869169 is an equidigital number, since it uses as much as digits as its factorization.

136869169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 419904, while the sum is 49.

The square root of 136869169 is about 11699.1097524555. The cubic root of 136869169 is about 515.3495211140.

The spelling of 136869169 in words is "one hundred thirty-six million, eight hundred sixty-nine thousand, one hundred sixty-nine".