129449025847 has 2 divisors, whose sum is σ = 129449025848. Its totient is φ = 129449025846.

The previous prime is 129449025841. The next prime is 129449025851. The reversal of 129449025847 is 748520944921.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129449025847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129449025841) 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, 64724512923 + 64724512924.

It is an arithmetic number, because the mean of its divisors is an integer number (64724512924).

Almost surely, 2^129449025847 is an apocalyptic number.

129449025847 is a deficient number, since it is larger than the sum of its proper divisors (1).

129449025847 is an equidigital number, since it uses as much as digits as its factorization.

129449025847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5806080, while the sum is 55.

The spelling of 129449025847 in words is "one hundred twenty-nine billion, four hundred forty-nine million, twenty-five thousand, eight hundred forty-seven".