136780169 has 2 divisors, whose sum is σ = 136780170. Its totient is φ = 136780168.

The previous prime is 136780139. The next prime is 136780177. The reversal of 136780169 is 961087631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73736569 + 63043600 = 8587^2 + 7940^2 .

It is a cyclic number.

It is not a de Polignac number, because 136780169 - 2⁸ = 136779913 is a prime.

It is a super-2 number, since 2×136780169² = 37417629263337122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (136780109) 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, 68390084 + 68390085.

It is an arithmetic number, because the mean of its divisors is an integer number (68390085).

Almost surely, 2^136780169 is an apocalyptic number.

It is an amenable number.

136780169 is a deficient number, since it is larger than the sum of its proper divisors (1).

136780169 is an equidigital number, since it uses as much as digits as its factorization.

136780169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 136780169 is about 11695.3054256826. The cubic root of 136780169 is about 515.2377938519.

The spelling of 136780169 in words is "one hundred thirty-six million, seven hundred eighty thousand, one hundred sixty-nine".