291163 has 4 divisors (see below), whose sum is σ = 292248. Its totient is φ = 290080.

The previous prime is 291143. The next prime is 291167. The reversal of 291163 is 361192.

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.

It is a cyclic number.

It is not a de Polignac number, because 291163 - 2¹⁷ = 160091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (291167) 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, 195 + ... + 787.

It is an arithmetic number, because the mean of its divisors is an integer number (73062).

2²⁹¹¹⁶³ is an apocalyptic number.

291163 is a deficient number, since it is larger than the sum of its proper divisors (1085).

291163 is an equidigital number, since it uses as much as digits as its factorization.

291163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1084.

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

The square root of 291163 is about 539.5952186593. The cubic root of 291163 is about 66.2794244517.

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

The spelling of 291163 in words is "two hundred ninety-one thousand, one hundred sixty-three".