818835161 has 2 divisors, whose sum is σ = 818835162. Its totient is φ = 818835160.

The previous prime is 818835139. The next prime is 818835181. The reversal of 818835161 is 161538818.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 637259536 + 181575625 = 25244^2 + 13475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-818835161 is a prime.

It is not a weakly prime, because it can be changed into another prime (818835181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409417580 + 409417581.

It is an arithmetic number, because the mean of its divisors is an integer number (409417581).

Almost surely, 2^818835161 is an apocalyptic number.

It is an amenable number.

818835161 is a deficient number, since it is larger than the sum of its proper divisors (1).

818835161 is an equidigital number, since it uses as much as digits as its factorization.

818835161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46080, while the sum is 41.

The square root of 818835161 is about 28615.2959271785. The cubic root of 818835161 is about 935.5467499109.

The spelling of 818835161 in words is "eight hundred eighteen million, eight hundred thirty-five thousand, one hundred sixty-one".