129288169 has 2 divisors, whose sum is σ = 129288170. Its totient is φ = 129288168.

The previous prime is 129288167. The next prime is 129288193. The reversal of 129288169 is 961882921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118810000 + 10478169 = 10900^2 + 3237^2 .

It is a cyclic number.

It is not a de Polignac number, because 129288169 - 2¹ = 129288167 is a prime.

It is a super-2 number, since 2×129288169² = 33430861286745122, which contains 22 as substring.

Together with 129288167, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (129288167) 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, 64644084 + 64644085.

It is an arithmetic number, because the mean of its divisors is an integer number (64644085).

Almost surely, 2^129288169 is an apocalyptic number.

It is an amenable number.

129288169 is a deficient number, since it is larger than the sum of its proper divisors (1).

129288169 is an equidigital number, since it uses as much as digits as its factorization.

129288169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 46.

The square root of 129288169 is about 11370.4955476883. The cubic root of 129288169 is about 505.6533959778.

The spelling of 129288169 in words is "one hundred twenty-nine million, two hundred eighty-eight thousand, one hundred sixty-nine".