117855919 has 4 divisors (see below), whose sum is σ = 118349280. Its totient is φ = 117362560.

The previous prime is 117855911. The next prime is 117855937. The reversal of 117855919 is 919558711.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 117855919 - 2³ = 117855911 is a prime.

It is a super-3 number, since 3×117855919³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117855911) 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, 246322 + ... + 246799.

It is an arithmetic number, because the mean of its divisors is an integer number (29587320).

Almost surely, 2^117855919 is an apocalyptic number.

117855919 is a deficient number, since it is larger than the sum of its proper divisors (493361).

117855919 is an equidigital number, since it uses as much as digits as its factorization.

117855919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493360.

The product of its digits is 113400, while the sum is 46.

The square root of 117855919 is about 10856.1465999681. The cubic root of 117855919 is about 490.2870995556.

The spelling of 117855919 in words is "one hundred seventeen million, eight hundred fifty-five thousand, nine hundred nineteen".