117705581 has 8 divisors (see below), whose sum is σ = 134587584. Its totient is φ = 100840320.

The previous prime is 117705571. The next prime is 117705583. The reversal of 117705581 is 185507711.

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

It is not a de Polignac number, because 117705581 - 2⁶ = 117705517 is a prime.

It is a super-2 number, since 2×117705581² = 27709207597095122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117705583) 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, 21026 + ... + 26028.

It is an arithmetic number, because the mean of its divisors is an integer number (16823448).

Almost surely, 2^117705581 is an apocalyptic number.

It is an amenable number.

117705581 is a deficient number, since it is larger than the sum of its proper divisors (16882003).

117705581 is an equidigital number, since it uses as much as digits as its factorization.

117705581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8371.

The product of its (nonzero) digits is 9800, while the sum is 35.

The square root of 117705581 is about 10849.2202945650. The cubic root of 117705581 is about 490.0785394029.

The spelling of 117705581 in words is "one hundred seventeen million, seven hundred five thousand, five hundred eighty-one".