173129129 has 2 divisors, whose sum is σ = 173129130. Its totient is φ = 173129128.

The previous prime is 173129113. The next prime is 173129149. The reversal of 173129129 is 921921371.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109767529 + 63361600 = 10477^2 + 7960^2 .

It is a cyclic number.

It is not a de Polignac number, because 173129129 - 2⁴ = 173129113 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (173129149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86564564 + 86564565.

It is an arithmetic number, because the mean of its divisors is an integer number (86564565).

Almost surely, 2^173129129 is an apocalyptic number.

It is an amenable number.

173129129 is a deficient number, since it is larger than the sum of its proper divisors (1).

173129129 is an equidigital number, since it uses as much as digits as its factorization.

173129129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6804, while the sum is 35.

The square root of 173129129 is about 13157.8542703588. The cubic root of 173129129 is about 557.3440657281.

The spelling of 173129129 in words is "one hundred seventy-three million, one hundred twenty-nine thousand, one hundred twenty-nine".