291116107 has 4 divisors (see below), whose sum is σ = 291150936. Its totient is φ = 291081280.

The previous prime is 291116099. The next prime is 291116141. The reversal of 291116107 is 701611192.

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 291116107 - 2³ = 291116099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (291116807) 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, 3483 + ... + 24379.

It is an arithmetic number, because the mean of its divisors is an integer number (72787734).

Almost surely, 2^291116107 is an apocalyptic number.

291116107 is a deficient number, since it is larger than the sum of its proper divisors (34829).

291116107 is a wasteful number, since it uses less digits than its factorization.

291116107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34828.

The product of its (nonzero) digits is 756, while the sum is 28.

The square root of 291116107 is about 17062.1249262804. The cubic root of 291116107 is about 662.7586606922.

Adding to 291116107 its reverse (701611192), we get a palindrome (992727299).

The spelling of 291116107 in words is "two hundred ninety-one million, one hundred sixteen thousand, one hundred seven".