129869219 has 2 divisors, whose sum is σ = 129869220. Its totient is φ = 129869218.

The previous prime is 129869177. The next prime is 129869227. The reversal of 129869219 is 912968921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129869219 - 2¹² = 129865123 is a prime.

It is a super-2 number, since 2×129869219² = 33732028087339922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (129862219) 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, 64934609 + 64934610.

It is an arithmetic number, because the mean of its divisors is an integer number (64934610).

Almost surely, 2^129869219 is an apocalyptic number.

129869219 is a deficient number, since it is larger than the sum of its proper divisors (1).

129869219 is an equidigital number, since it uses as much as digits as its factorization.

129869219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 47.

The square root of 129869219 is about 11396.0176816290. The cubic root of 129869219 is about 506.4097705543.

The spelling of 129869219 in words is "one hundred twenty-nine million, eight hundred sixty-nine thousand, two hundred nineteen".