129863369 has 2 divisors, whose sum is σ = 129863370. Its totient is φ = 129863368.

The previous prime is 129863341. The next prime is 129863389. The reversal of 129863369 is 963368921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67453369 + 62410000 = 8213^2 + 7900^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129863369 is a prime.

It is a super-2 number, since 2×129863369² = 33728989216060322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (129863339) 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, 64931684 + 64931685.

It is an arithmetic number, because the mean of its divisors is an integer number (64931685).

Almost surely, 2^129863369 is an apocalyptic number.

It is an amenable number.

129863369 is a deficient number, since it is larger than the sum of its proper divisors (1).

129863369 is an equidigital number, since it uses as much as digits as its factorization.

129863369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 419904, while the sum is 47.

The square root of 129863369 is about 11395.7610101300. The cubic root of 129863369 is about 506.4021666441.

The spelling of 129863369 in words is "one hundred twenty-nine million, eight hundred sixty-three thousand, three hundred sixty-nine".