136561429 has 2 divisors, whose sum is σ = 136561430. Its totient is φ = 136561428.

The previous prime is 136561363. The next prime is 136561433. The reversal of 136561429 is 924165631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136258929 + 302500 = 11673^2 + 550^2 .

It is a cyclic number.

It is not a de Polignac number, because 136561429 - 2⁷ = 136561301 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136561729) 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, 68280714 + 68280715.

It is an arithmetic number, because the mean of its divisors is an integer number (68280715).

Almost surely, 2^136561429 is an apocalyptic number.

It is an amenable number.

136561429 is a deficient number, since it is larger than the sum of its proper divisors (1).

136561429 is an equidigital number, since it uses as much as digits as its factorization.

136561429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 37.

The square root of 136561429 is about 11685.9500683513. The cubic root of 136561429 is about 514.9629897682.

The spelling of 136561429 in words is "one hundred thirty-six million, five hundred sixty-one thousand, four hundred twenty-nine".