965991161 has 2 divisors, whose sum is σ = 965991162. Its totient is φ = 965991160.

The previous prime is 965991149. The next prime is 965991163. The reversal of 965991161 is 161199569.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 525830761 + 440160400 = 22931^2 + 20980^2 .

It is a cyclic number.

It is not a de Polignac number, because 965991161 - 2¹⁴ = 965974777 is a prime.

Together with 965991163, 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 (965991163) 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, 482995580 + 482995581.

It is an arithmetic number, because the mean of its divisors is an integer number (482995581).

Almost surely, 2^965991161 is an apocalyptic number.

It is an amenable number.

965991161 is a deficient number, since it is larger than the sum of its proper divisors (1).

965991161 is an equidigital number, since it uses as much as digits as its factorization.

965991161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 131220, while the sum is 47.

The square root of 965991161 is about 31080.3983404332. The cubic root of 965991161 is about 988.5327245704.

The spelling of 965991161 in words is "nine hundred sixty-five million, nine hundred ninety-one thousand, one hundred sixty-one".