291116 has 24 divisors (see below), whose sum is σ = 600096. Its totient is φ = 120960.

The previous prime is 291113. The next prime is 291143. The reversal of 291116 is 611192.

291116 is an esthetic number in base 6, because in such base its adjacent digits differ by 1.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (291113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 896 + ... + 1176.

It is an arithmetic number, because the mean of its divisors is an integer number (25004).

2²⁹¹¹¹⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 291116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (300048).

291116 is an abundant number, since it is smaller than the sum of its proper divisors (308980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

291116 is a wasteful number, since it uses less digits than its factorization.

291116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329 (or 327 counting only the distinct ones).

The product of its digits is 108, while the sum is 20.

The square root of 291116 is about 539.5516657374. The cubic root of 291116 is about 66.2758579493.

The spelling of 291116 in words is "two hundred ninety-one thousand, one hundred sixteen".