129103771 has 2 divisors, whose sum is σ = 129103772. Its totient is φ = 129103770.

The previous prime is 129103757. The next prime is 129103787. The reversal of 129103771 is 177301921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129103771 - 2⁷ = 129103643 is a prime.

It is not a weakly prime, because it can be changed into another prime (129103721) 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, 64551885 + 64551886.

It is an arithmetic number, because the mean of its divisors is an integer number (64551886).

Almost surely, 2^129103771 is an apocalyptic number.

129103771 is a deficient number, since it is larger than the sum of its proper divisors (1).

129103771 is an equidigital number, since it uses as much as digits as its factorization.

129103771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2646, while the sum is 31.

The square root of 129103771 is about 11362.3840368120. The cubic root of 129103771 is about 505.4128845695.

The spelling of 129103771 in words is "one hundred twenty-nine million, one hundred three thousand, seven hundred seventy-one".