161795129 has 2 divisors, whose sum is σ = 161795130. Its totient is φ = 161795128.

The previous prime is 161795093. The next prime is 161795173. The reversal of 161795129 is 921597161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161671225 + 123904 = 12715^2 + 352^2 .

It is a cyclic number.

It is not a de Polignac number, because 161795129 - 2¹⁶ = 161729593 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (161795189) 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, 80897564 + 80897565.

It is an arithmetic number, because the mean of its divisors is an integer number (80897565).

Almost surely, 2^161795129 is an apocalyptic number.

It is an amenable number.

161795129 is a deficient number, since it is larger than the sum of its proper divisors (1).

161795129 is an equidigital number, since it uses as much as digits as its factorization.

161795129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34020, while the sum is 41.

The square root of 161795129 is about 12719.8714223061. The cubic root of 161795129 is about 544.9062813347.

The spelling of 161795129 in words is "one hundred sixty-one million, seven hundred ninety-five thousand, one hundred twenty-nine".