129118697 has 2 divisors, whose sum is σ = 129118698. Its totient is φ = 129118696.

The previous prime is 129118687. The next prime is 129118771. The reversal of 129118697 is 796811921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90231001 + 38887696 = 9499^2 + 6236^2 .

It is an emirp because it is prime and its reverse (796811921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129118697 - 2⁴ = 129118681 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (129118687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64559348 + 64559349.

It is an arithmetic number, because the mean of its divisors is an integer number (64559349).

Almost surely, 2^129118697 is an apocalyptic number.

It is an amenable number.

129118697 is a deficient number, since it is larger than the sum of its proper divisors (1).

129118697 is an equidigital number, since it uses as much as digits as its factorization.

129118697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 44.

The square root of 129118697 is about 11363.0408342133. The cubic root of 129118697 is about 505.4323611553.

The spelling of 129118697 in words is "one hundred twenty-nine million, one hundred eighteen thousand, six hundred ninety-seven".