163530091 has 2 divisors, whose sum is σ = 163530092. Its totient is φ = 163530090.

The previous prime is 163530077. The next prime is 163530127. The reversal of 163530091 is 190035361.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 163530091 - 2¹⁹ = 163005803 is a prime.

It is not a weakly prime, because it can be changed into another prime (163537091) 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, 81765045 + 81765046.

It is an arithmetic number, because the mean of its divisors is an integer number (81765046).

Almost surely, 2^163530091 is an apocalyptic number.

163530091 is a deficient number, since it is larger than the sum of its proper divisors (1).

163530091 is an equidigital number, since it uses as much as digits as its factorization.

163530091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 163530091 is about 12787.8884496229. Note that the first 3 decimals coincide. The cubic root of 163530091 is about 546.8470741484.

The spelling of 163530091 in words is "one hundred sixty-three million, five hundred thirty thousand, ninety-one".