800161 has 2 divisors, whose sum is σ = 800162. Its totient is φ = 800160.

The previous prime is 800159. The next prime is 800171. The reversal of 800161 is 161008.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 463761 + 336400 = 681^2 + 580^2 .

It is a cyclic number.

It is not a de Polignac number, because 800161 - 2¹ = 800159 is a prime.

Together with 800159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (800131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400080 + 400081.

It is an arithmetic number, because the mean of its divisors is an integer number (400081).

2⁸⁰⁰¹⁶¹ is an apocalyptic number.

It is an amenable number.

800161 is a deficient number, since it is larger than the sum of its proper divisors (1).

800161 is an equidigital number, since it uses as much as digits as its factorization.

800161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 800161 is about 894.5171882083. The cubic root of 800161 is about 92.8380037196.

Adding to 800161 its reverse (161008), we get a palindrome (961169).

It can be divided in two parts, 800 and 161, that added together give a square (961 = 31²).

The spelling of 800161 in words is "eight hundred thousand, one hundred sixty-one".