129718847 has 2 divisors, whose sum is σ = 129718848. Its totient is φ = 129718846.

The previous prime is 129718843. The next prime is 129718867. The reversal of 129718847 is 748817921.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129718847 - 2² = 129718843 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129718843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64859423 + 64859424.

It is an arithmetic number, because the mean of its divisors is an integer number (64859424).

Almost surely, 2^129718847 is an apocalyptic number.

129718847 is a deficient number, since it is larger than the sum of its proper divisors (1).

129718847 is an equidigital number, since it uses as much as digits as its factorization.

129718847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 47.

The square root of 129718847 is about 11389.4182028759. The cubic root of 129718847 is about 506.2142424168.

The spelling of 129718847 in words is "one hundred twenty-nine million, seven hundred eighteen thousand, eight hundred forty-seven".