117917278 has 8 divisors (see below), whose sum is σ = 177271200. Its totient is φ = 58826880.

The previous prime is 117917263. The next prime is 117917279. The reversal of 117917278 is 872719711.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117917279) 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, 64758 + ... + 66553.

It is an arithmetic number, because the mean of its divisors is an integer number (22158900).

Almost surely, 2^117917278 is an apocalyptic number.

117917278 is a deficient number, since it is larger than the sum of its proper divisors (59353922).

117917278 is a wasteful number, since it uses less digits than its factorization.

117917278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131762.

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

The square root of 117917278 is about 10858.9722349769. The cubic root of 117917278 is about 490.3721703978.

The spelling of 117917278 in words is "one hundred seventeen million, nine hundred seventeen thousand, two hundred seventy-eight".