117943985 has 8 divisors (see below), whose sum is σ = 142566696. Its totient is φ = 93665920.

The previous prime is 117943981. The next prime is 117944017. The reversal of 117943985 is 589349711.

It can be written as a sum of positive squares in 4 ways, for example, as 36385024 + 81558961 = 6032^2 + 9031^2 .

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

It is not a de Polignac number, because 117943985 - 2² = 117943981 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117943981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85406 + ... + 86775.

It is an arithmetic number, because the mean of its divisors is an integer number (17820837).

Almost surely, 2^117943985 is an apocalyptic number.

It is an amenable number.

117943985 is a deficient number, since it is larger than the sum of its proper divisors (24622711).

117943985 is a wasteful number, since it uses less digits than its factorization.

117943985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172323.

The product of its digits is 272160, while the sum is 47.

The square root of 117943985 is about 10860.2018857846. The cubic root of 117943985 is about 490.4091889507.

The spelling of 117943985 in words is "one hundred seventeen million, nine hundred forty-three thousand, nine hundred eighty-five".