129833971 has 2 divisors, whose sum is σ = 129833972. Its totient is φ = 129833970.

The previous prime is 129833959. The next prime is 129833987. The reversal of 129833971 is 179338921.

It is a weak prime.

It is an emirp because it is prime and its reverse (179338921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129833971 - 2⁷ = 129833843 is a prime.

It is not a weakly prime, because it can be changed into another prime (129833911) 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, 64916985 + 64916986.

It is an arithmetic number, because the mean of its divisors is an integer number (64916986).

Almost surely, 2^129833971 is an apocalyptic number.

129833971 is a deficient number, since it is larger than the sum of its proper divisors (1).

129833971 is an equidigital number, since it uses as much as digits as its factorization.

129833971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 43.

The square root of 129833971 is about 11394.4710715329. The cubic root of 129833971 is about 506.3639512630.

The spelling of 129833971 in words is "one hundred twenty-nine million, eight hundred thirty-three thousand, nine hundred seventy-one".