117917287 has 8 divisors (see below), whose sum is σ = 131425200. Its totient is φ = 105139584.

The previous prime is 117917279. The next prime is 117917299. The reversal of 117917287 is 782719711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 117917287 - 2³ = 117917279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117917227) 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, 182212 + ... + 182857.

It is an arithmetic number, because the mean of its divisors is an integer number (16428150).

Almost surely, 2^117917287 is an apocalyptic number.

117917287 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

117917287 is a deficient number, since it is larger than the sum of its proper divisors (13507913).

117917287 is a wasteful number, since it uses less digits than its factorization.

117917287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365105.

The product of its digits is 49392, while the sum is 43.

The square root of 117917287 is about 10858.9726493808. The cubic root of 117917287 is about 490.3721828737.

The spelling of 117917287 in words is "one hundred seventeen million, nine hundred seventeen thousand, two hundred eighty-seven".