129318127 has 2 divisors, whose sum is σ = 129318128. Its totient is φ = 129318126.

The previous prime is 129318097. The next prime is 129318139. The reversal of 129318127 is 721813921.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129318127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129318092 and 129318101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129310127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64659063 + 64659064.

It is an arithmetic number, because the mean of its divisors is an integer number (64659064).

Almost surely, 2^129318127 is an apocalyptic number.

129318127 is a deficient number, since it is larger than the sum of its proper divisors (1).

129318127 is an equidigital number, since it uses as much as digits as its factorization.

129318127 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 34.

The square root of 129318127 is about 11371.8128282170. The cubic root of 129318127 is about 505.6924487766.

It can be divided in two parts, 12 and 9318127, that added together give a palindrome (9318139).

The spelling of 129318127 in words is "one hundred twenty-nine million, three hundred eighteen thousand, one hundred twenty-seven".