291317117 has 16 divisors (see below), whose sum is σ = 379636992. Its totient is φ = 216933120.

The previous prime is 291317041. The next prime is 291317119. The reversal of 291317117 is 711713192.

It is a cyclic number.

It is not a de Polignac number, because 291317117 - 2¹⁰ = 291316093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (291317119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92609 + ... + 95702.

It is an arithmetic number, because the mean of its divisors is an integer number (23727312).

Almost surely, 2^291317117 is an apocalyptic number.

It is an amenable number.

291317117 is a deficient number, since it is larger than the sum of its proper divisors (88319875).

291317117 is a wasteful number, since it uses less digits than its factorization.

291317117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188348.

The product of its digits is 2646, while the sum is 32.

The square root of 291317117 is about 17068.0144422250. The cubic root of 291317117 is about 662.9111662444.

The spelling of 291317117 in words is "two hundred ninety-one million, three hundred seventeen thousand, one hundred seventeen".