117931855 has 8 divisors (see below), whose sum is σ = 143917200. Its totient is φ = 92746176.

The previous prime is 117931831. The next prime is 117931889. The reversal of 117931855 is 558139711.

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 117931855 - 2⁹ = 117931343 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199590 + ... + 200179.

It is an arithmetic number, because the mean of its divisors is an integer number (17989650).

Almost surely, 2^117931855 is an apocalyptic number.

117931855 is a deficient number, since it is larger than the sum of its proper divisors (25985345).

117931855 is an equidigital number, since it uses as much as digits as its factorization.

117931855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399833.

The product of its digits is 37800, while the sum is 40.

The square root of 117931855 is about 10859.6434103519. The cubic root of 117931855 is about 490.3923762594.

The spelling of 117931855 in words is "one hundred seventeen million, nine hundred thirty-one thousand, eight hundred fifty-five".