129043199 has 2 divisors, whose sum is σ = 129043200. Its totient is φ = 129043198.

The previous prime is 129043183. The next prime is 129043217. The reversal of 129043199 is 991340921.

It is a weak prime.

It is an emirp because it is prime and its reverse (991340921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129043199 - 2⁴ = 129043183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129045199) 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, 64521599 + 64521600.

It is an arithmetic number, because the mean of its divisors is an integer number (64521600).

Almost surely, 2^129043199 is an apocalyptic number.

129043199 is a deficient number, since it is larger than the sum of its proper divisors (1).

129043199 is an equidigital number, since it uses as much as digits as its factorization.

129043199 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 129043199 is about 11359.7182623514. The cubic root of 129043199 is about 505.3338301830. Note that the first 3 decimals are identical.

The spelling of 129043199 in words is "one hundred twenty-nine million, forty-three thousand, one hundred ninety-nine".