129343139 has 2 divisors, whose sum is σ = 129343140. Its totient is φ = 129343138.

The previous prime is 129343121. The next prime is 129343141. The reversal of 129343139 is 931343921.

It is a strong prime.

It is an emirp because it is prime and its reverse (931343921) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129343139 is a prime.

Together with 129343141, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 129343099 and 129343108.

It is not a weakly prime, because it can be changed into another prime (128343139) 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, 64671569 + 64671570.

It is an arithmetic number, because the mean of its divisors is an integer number (64671570).

Almost surely, 2^129343139 is an apocalyptic number.

129343139 is a deficient number, since it is larger than the sum of its proper divisors (1).

129343139 is an equidigital number, since it uses as much as digits as its factorization.

129343139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496, while the sum is 35.

The square root of 129343139 is about 11372.9125117535. The cubic root of 129343139 is about 505.7250494244.

The spelling of 129343139 in words is "one hundred twenty-nine million, three hundred forty-three thousand, one hundred thirty-nine".