129996847 has 2 divisors, whose sum is σ = 129996848. Its totient is φ = 129996846.

The previous prime is 129996787. The next prime is 129996859. The reversal of 129996847 is 748699921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129996847 - 2⁷ = 129996719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129996247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64998423 + 64998424.

It is an arithmetic number, because the mean of its divisors is an integer number (64998424).

Almost surely, 2^129996847 is an apocalyptic number.

129996847 is a deficient number, since it is larger than the sum of its proper divisors (1).

129996847 is an equidigital number, since it uses as much as digits as its factorization.

129996847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 55.

The square root of 129996847 is about 11401.6159819562. The cubic root of 129996847 is about 506.5756063749.

The spelling of 129996847 in words is "one hundred twenty-nine million, nine hundred ninety-six thousand, eight hundred forty-seven".