788636161 has 2 divisors, whose sum is σ = 788636162. Its totient is φ = 788636160.

The previous prime is 788636159. The next prime is 788636183. The reversal of 788636161 is 161636887.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 669826161 + 118810000 = 25881^2 + 10900^2 .

It is an emirp because it is prime and its reverse (161636887) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 788636161 - 2¹ = 788636159 is a prime.

Together with 788636159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (788636141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 394318080 + 394318081.

It is an arithmetic number, because the mean of its divisors is an integer number (394318081).

Almost surely, 2^788636161 is an apocalyptic number.

It is an amenable number.

788636161 is a deficient number, since it is larger than the sum of its proper divisors (1).

788636161 is an equidigital number, since it uses as much as digits as its factorization.

788636161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 46.

The square root of 788636161 is about 28082.6665578609. Note that the first 3 decimals coincide. The cubic root of 788636161 is about 923.9012660536.

The spelling of 788636161 in words is "seven hundred eighty-eight million, six hundred thirty-six thousand, one hundred sixty-one".