129397039 has 2 divisors, whose sum is σ = 129397040. Its totient is φ = 129397038.

The previous prime is 129397027. The next prime is 129397109. The reversal of 129397039 is 930793921.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129397039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129396986 and 129397004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129397139) 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, 64698519 + 64698520.

It is an arithmetic number, because the mean of its divisors is an integer number (64698520).

Almost surely, 2^129397039 is an apocalyptic number.

129397039 is a deficient number, since it is larger than the sum of its proper divisors (1).

129397039 is an equidigital number, since it uses as much as digits as its factorization.

129397039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 91854, while the sum is 43.

The square root of 129397039 is about 11375.2819305721. The cubic root of 129397039 is about 505.7952884152.

The spelling of 129397039 in words is "one hundred twenty-nine million, three hundred ninety-seven thousand, thirty-nine".