129800243 has 2 divisors, whose sum is σ = 129800244. Its totient is φ = 129800242.

The previous prime is 129800227. The next prime is 129800257. The reversal of 129800243 is 342008921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129800243 - 2⁴ = 129800227 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (129800263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64900121 + 64900122.

It is an arithmetic number, because the mean of its divisors is an integer number (64900122).

Almost surely, 2^129800243 is an apocalyptic number.

129800243 is a deficient number, since it is larger than the sum of its proper divisors (1).

129800243 is an equidigital number, since it uses as much as digits as its factorization.

129800243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 129800243 is about 11392.9909593574. The cubic root of 129800243 is about 506.3201000729.

The spelling of 129800243 in words is "one hundred twenty-nine million, eight hundred thousand, two hundred forty-three".