117831999 has 8 divisors (see below), whose sum is σ = 157213872. Its totient is φ = 78502400.

The previous prime is 117831983. The next prime is 117832007. The reversal of 117831999 is 999138711.

It is a happy number.

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 117831999 - 2⁴ = 117831983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117831929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7464 + ... + 17069.

It is an arithmetic number, because the mean of its divisors is an integer number (19651734).

Almost surely, 2^117831999 is an apocalyptic number.

117831999 is a deficient number, since it is larger than the sum of its proper divisors (39381873).

117831999 is a wasteful number, since it uses less digits than its factorization.

117831999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26137.

The product of its digits is 122472, while the sum is 48.

The square root of 117831999 is about 10855.0448640252. The cubic root of 117831999 is about 490.2539278065.

The spelling of 117831999 in words is "one hundred seventeen million, eight hundred thirty-one thousand, nine hundred ninety-nine".