161834161 has 2 divisors, whose sum is σ = 161834162. Its totient is φ = 161834160.

The previous prime is 161834119. The next prime is 161834171. The reversal of 161834161 is 161438161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155151936 + 6682225 = 12456^2 + 2585^2 .

It is an emirp because it is prime and its reverse (161438161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161834161 - 2¹¹ = 161832113 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (161834171) 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, 80917080 + 80917081.

It is an arithmetic number, because the mean of its divisors is an integer number (80917081).

Almost surely, 2^161834161 is an apocalyptic number.

It is an amenable number.

161834161 is a deficient number, since it is larger than the sum of its proper divisors (1).

161834161 is an equidigital number, since it uses as much as digits as its factorization.

161834161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 31.

The square root of 161834161 is about 12721.4056220215. The cubic root of 161834161 is about 544.9500961516.

The spelling of 161834161 in words is "one hundred sixty-one million, eight hundred thirty-four thousand, one hundred sixty-one".