200000161 has 2 divisors, whose sum is σ = 200000162. Its totient is φ = 200000160.

The previous prime is 200000131. The next prime is 200000183. The reversal of 200000161 is 161000002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129960000 + 70040161 = 11400^2 + 8369^2 .

It is a cyclic number.

It is not a de Polignac number, because 200000161 - 2⁷ = 200000033 is a prime.

It is not a weakly prime, because it can be changed into another prime (200000131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100000080 + 100000081.

It is an arithmetic number, because the mean of its divisors is an integer number (100000081).

Almost surely, 2^200000161 is an apocalyptic number.

It is an amenable number.

200000161 is a deficient number, since it is larger than the sum of its proper divisors (1).

200000161 is an equidigital number, since it uses as much as digits as its factorization.

200000161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 200000161 is about 14142.1413159394. The cubic root of 200000161 is about 584.8037045648.

Adding to 200000161 its reverse (161000002), we get a palindrome (361000163).

The spelling of 200000161 in words is "two hundred million, one hundred sixty-one", and thus it is an aban number.