805983161 has 2 divisors, whose sum is σ = 805983162. Its totient is φ = 805983160.

The previous prime is 805983149. The next prime is 805983223. The reversal of 805983161 is 161389508.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 541725625 + 264257536 = 23275^2 + 16256^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-805983161 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (805982161) 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, 402991580 + 402991581.

It is an arithmetic number, because the mean of its divisors is an integer number (402991581).

Almost surely, 2^805983161 is an apocalyptic number.

It is an amenable number.

805983161 is a deficient number, since it is larger than the sum of its proper divisors (1).

805983161 is an equidigital number, since it uses as much as digits as its factorization.

805983161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 805983161 is about 28389.8425673691. The cubic root of 805983161 is about 930.6263022177.

The spelling of 805983161 in words is "eight hundred five million, nine hundred eighty-three thousand, one hundred sixty-one".