129589687 has 2 divisors, whose sum is σ = 129589688. Its totient is φ = 129589686.

The previous prime is 129589639. The next prime is 129589693. The reversal of 129589687 is 786985921.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129589687 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129589627) 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, 64794843 + 64794844.

It is an arithmetic number, because the mean of its divisors is an integer number (64794844).

Almost surely, 2^129589687 is an apocalyptic number.

129589687 is a deficient number, since it is larger than the sum of its proper divisors (1).

129589687 is an equidigital number, since it uses as much as digits as its factorization.

129589687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 55.

The square root of 129589687 is about 11383.7466152405. The cubic root of 129589687 is about 506.0461754900.

The spelling of 129589687 in words is "one hundred twenty-nine million, five hundred eighty-nine thousand, six hundred eighty-seven".