163607161 has 2 divisors, whose sum is σ = 163607162. Its totient is φ = 163607160.

The previous prime is 163607159. The next prime is 163607189. The reversal of 163607161 is 161706361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82246761 + 81360400 = 9069^2 + 9020^2 .

It is an emirp because it is prime and its reverse (161706361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 163607161 - 2¹ = 163607159 is a prime.

Together with 163607159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (163637161) 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, 81803580 + 81803581.

It is an arithmetic number, because the mean of its divisors is an integer number (81803581).

Almost surely, 2^163607161 is an apocalyptic number.

It is an amenable number.

163607161 is a deficient number, since it is larger than the sum of its proper divisors (1).

163607161 is an equidigital number, since it uses as much as digits as its factorization.

163607161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 163607161 is about 12790.9014928581. The cubic root of 163607161 is about 546.9329684010.

The spelling of 163607161 in words is "one hundred sixty-three million, six hundred seven thousand, one hundred sixty-one".