117809481 has 8 divisors (see below), whose sum is σ = 165346720. Its totient is φ = 74405952.

The previous prime is 117809467. The next prime is 117809533. The reversal of 117809481 is 184908711.

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

It is not a de Polignac number, because 117809481 - 2⁵ = 117809449 is a prime.

It is a super-2 number, since 2×117809481² = 27758147626978722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117809431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1033360 + ... + 1033473.

It is an arithmetic number, because the mean of its divisors is an integer number (20668340).

Almost surely, 2^117809481 is an apocalyptic number.

It is an amenable number.

117809481 is a deficient number, since it is larger than the sum of its proper divisors (47537239).

117809481 is a wasteful number, since it uses less digits than its factorization.

117809481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2066855.

The product of its (nonzero) digits is 16128, while the sum is 39.

The square root of 117809481 is about 10854.0076008818. The cubic root of 117809481 is about 490.2226962187. Note that the first 3 decimals are identical.

The spelling of 117809481 in words is "one hundred seventeen million, eight hundred nine thousand, four hundred eighty-one".