129642911 has 2 divisors, whose sum is σ = 129642912. Its totient is φ = 129642910.

The previous prime is 129642869. The next prime is 129642917. The reversal of 129642911 is 119246921.

It is a strong prime.

It is an emirp because it is prime and its reverse (119246921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129642911 - 2²⁶ = 62534047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129642917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64821455 + 64821456.

It is an arithmetic number, because the mean of its divisors is an integer number (64821456).

Almost surely, 2^129642911 is an apocalyptic number.

129642911 is a deficient number, since it is larger than the sum of its proper divisors (1).

129642911 is an equidigital number, since it uses as much as digits as its factorization.

129642911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 35.

The square root of 129642911 is about 11386.0840941915. The cubic root of 129642911 is about 506.1154457016.

The spelling of 129642911 in words is "one hundred twenty-nine million, six hundred forty-two thousand, nine hundred eleven".