805008161 has 2 divisors, whose sum is σ = 805008162. Its totient is φ = 805008160.

The previous prime is 805008103. The next prime is 805008163. The reversal of 805008161 is 161800508.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 683038225 + 121969936 = 26135^2 + 11044^2 .

It is a cyclic number.

It is not a de Polignac number, because 805008161 - 2²² = 800813857 is a prime.

Together with 805008163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (805008163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402504080 + 402504081.

It is an arithmetic number, because the mean of its divisors is an integer number (402504081).

Almost surely, 2^805008161 is an apocalyptic number.

It is an amenable number.

805008161 is a deficient number, since it is larger than the sum of its proper divisors (1).

805008161 is an equidigital number, since it uses as much as digits as its factorization.

805008161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 805008161 is about 28372.6657365853. The cubic root of 805008161 is about 930.2508904170.

Adding to 805008161 its reverse (161800508), we get a palindrome (966808669).

The spelling of 805008161 in words is "eight hundred five million, eight thousand, one hundred sixty-one".