163291 has 4 divisors (see below), whose sum is σ = 164152. Its totient is φ = 162432.

The previous prime is 163259. The next prime is 163307. The reversal of 163291 is 192361.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 192361 = 13 ⋅14797.

It is a cyclic number.

It is not a de Polignac number, because 163291 - 2⁵ = 163259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163211) 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 in 3 ways as a sum of consecutive naturals, for example, 6 + ... + 571.

It is an arithmetic number, because the mean of its divisors is an integer number (41038).

2¹⁶³²⁹¹ is an apocalyptic number.

163291 is a deficient number, since it is larger than the sum of its proper divisors (861).

163291 is an equidigital number, since it uses as much as digits as its factorization.

163291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860.

The product of its digits is 324, while the sum is 22.

The square root of 163291 is about 404.0928111214. The cubic root of 163291 is about 54.6580436197.

It can be divided in two parts, 163 and 291, that added together give a palindrome (454).

The spelling of 163291 in words is "one hundred sixty-three thousand, two hundred ninety-one".