117820171 has 8 divisors (see below), whose sum is σ = 135887840. Its totient is φ = 100061568.

The previous prime is 117820163. The next prime is 117820187. The reversal of 117820171 is 171028711.

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 117820171 - 2³ = 117820163 is a prime.

It is the 10855-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117820471) by changing a digit.

It is a nontrivial repunit in base 10854.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76446 + ... + 77971.

It is an arithmetic number, because the mean of its divisors is an integer number (16985980).

Almost surely, 2^117820171 is an apocalyptic number.

117820171 is a deficient number, since it is larger than the sum of its proper divisors (18067669).

117820171 is a wasteful number, since it uses less digits than its factorization.

117820171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154533.

The product of its (nonzero) digits is 784, while the sum is 28.

The square root of 117820171 is about 10854.5000345479. The cubic root of 117820171 is about 490.2375233280.

Adding to 117820171 its reverse (171028711), we get a palindrome (288848882).

The spelling of 117820171 in words is "one hundred seventeen million, eight hundred twenty thousand, one hundred seventy-one".