163000091 has 2 divisors, whose sum is σ = 163000092. Its totient is φ = 163000090.

The previous prime is 163000073. The next prime is 163000099. The reversal of 163000091 is 190000361.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 163000091 - 2¹⁸ = 162737947 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (163000099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81500045 + 81500046.

It is an arithmetic number, because the mean of its divisors is an integer number (81500046).

Almost surely, 2^163000091 is an apocalyptic number.

163000091 is a deficient number, since it is larger than the sum of its proper divisors (1).

163000091 is an equidigital number, since it uses as much as digits as its factorization.

163000091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 163000091 is about 12767.1488986383. The cubic root of 163000091 is about 546.2556587830.

The spelling of 163000091 in words is "one hundred sixty-three million, ninety-one", and thus it is an aban number.