136818629 has 2 divisors, whose sum is σ = 136818630. Its totient is φ = 136818628.

The previous prime is 136818613. The next prime is 136818631. The reversal of 136818629 is 926818631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123165604 + 13653025 = 11098^2 + 3695^2 .

It is a cyclic number.

It is not a de Polignac number, because 136818629 - 2⁴ = 136818613 is a prime.

Together with 136818631, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 136818629.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136818659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68409314 + 68409315.

It is an arithmetic number, because the mean of its divisors is an integer number (68409315).

Almost surely, 2^136818629 is an apocalyptic number.

It is an amenable number.

136818629 is a deficient number, since it is larger than the sum of its proper divisors (1).

136818629 is an equidigital number, since it uses as much as digits as its factorization.

136818629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 44.

The square root of 136818629 is about 11696.9495596074. The cubic root of 136818629 is about 515.2860810383.

The spelling of 136818629 in words is "one hundred thirty-six million, eight hundred eighteen thousand, six hundred twenty-nine".