129288769 has 2 divisors, whose sum is σ = 129288770. Its totient is φ = 129288768.

The previous prime is 129288743. The next prime is 129288821. The reversal of 129288769 is 967882921.

It is an a-pointer prime, because the next prime (129288821) can be obtained adding 129288769 to its sum of digits (52).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126855169 + 2433600 = 11263^2 + 1560^2 .

It is a cyclic number.

It is not a de Polignac number, because 129288769 - 2⁵ = 129288737 is a prime.

It is a super-2 number, since 2×129288769² = 33431171579070722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (129288169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64644384 + 64644385.

It is an arithmetic number, because the mean of its divisors is an integer number (64644385).

Almost surely, 2^129288769 is an apocalyptic number.

It is an amenable number.

129288769 is a deficient number, since it is larger than the sum of its proper divisors (1).

129288769 is an equidigital number, since it uses as much as digits as its factorization.

129288769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 52.

The square root of 129288769 is about 11370.5219317321. The cubic root of 129288769 is about 505.6541781880.

The spelling of 129288769 in words is "one hundred twenty-nine million, two hundred eighty-eight thousand, seven hundred sixty-nine".