129836117 has 2 divisors, whose sum is σ = 129836118. Its totient is φ = 129836116.

The previous prime is 129836093. The next prime is 129836131. The reversal of 129836117 is 711638921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113401201 + 16434916 = 10649^2 + 4054^2 .

It is a cyclic number.

It is not a de Polignac number, because 129836117 - 2⁸ = 129835861 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 (129836197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64918058 + 64918059.

It is an arithmetic number, because the mean of its divisors is an integer number (64918059).

Almost surely, 2^129836117 is an apocalyptic number.

It is an amenable number.

129836117 is a deficient number, since it is larger than the sum of its proper divisors (1).

129836117 is an equidigital number, since it uses as much as digits as its factorization.

129836117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 38.

The square root of 129836117 is about 11394.5652396219. The cubic root of 129836117 is about 506.3667411108.

The spelling of 129836117 in words is "one hundred twenty-nine million, eight hundred thirty-six thousand, one hundred seventeen".