163105091 has 2 divisors, whose sum is σ = 163105092. Its totient is φ = 163105090.

The previous prime is 163105081. The next prime is 163105133. The reversal of 163105091 is 190501361.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163105091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 163105091.

It is not a weakly prime, because it can be changed into another prime (163105051) 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, 81552545 + 81552546.

It is an arithmetic number, because the mean of its divisors is an integer number (81552546).

Almost surely, 2^163105091 is an apocalyptic number.

163105091 is a deficient number, since it is larger than the sum of its proper divisors (1).

163105091 is an equidigital number, since it uses as much as digits as its factorization.

163105091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 163105091 is about 12771.2603528391. The cubic root of 163105091 is about 546.3729277006.

The spelling of 163105091 in words is "one hundred sixty-three million, one hundred five thousand, ninety-one".