163091 has 4 divisors (see below), whose sum is σ = 168384. Its totient is φ = 157800.

The previous prime is 163063. The next prime is 163109. The reversal of 163091 is 190361.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 163091 - 2⁶ = 163027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2600 + ... + 2661.

It is an arithmetic number, because the mean of its divisors is an integer number (42096).

2¹⁶³⁰⁹¹ is an apocalyptic number.

163091 is a deficient number, since it is larger than the sum of its proper divisors (5293).

163091 is an equidigital number, since it uses as much as digits as its factorization.

163091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5292.

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

The square root of 163091 is about 403.8452673983. The cubic root of 163091 is about 54.6357193136.

The spelling of 163091 in words is "one hundred sixty-three thousand, ninety-one".