129175049 has 2 divisors, whose sum is σ = 129175050. Its totient is φ = 129175048.

The previous prime is 129174973. The next prime is 129175073. The reversal of 129175049 is 940571921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128981449 + 193600 = 11357^2 + 440^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129175049 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (129175099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64587524 + 64587525.

It is an arithmetic number, because the mean of its divisors is an integer number (64587525).

Almost surely, 2^129175049 is an apocalyptic number.

It is an amenable number.

129175049 is a deficient number, since it is larger than the sum of its proper divisors (1).

129175049 is an equidigital number, since it uses as much as digits as its factorization.

129175049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 129175049 is about 11365.5201816723. The cubic root of 129175049 is about 505.5058800247.

The spelling of 129175049 in words is "one hundred twenty-nine million, one hundred seventy-five thousand, forty-nine".