117947709 has 24 divisors (see below), whose sum is σ = 188913504. Its totient is φ = 70308000.

The previous prime is 117947707. The next prime is 117947743. The reversal of 117947709 is 907749711.

117947709 is a `hidden beast` number, since 1 + 179 + 477 + 0 + 9 = 666.

It is not a de Polignac number, because 117947709 - 2¹ = 117947707 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117947707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3727 + ... + 15804.

It is an arithmetic number, because the mean of its divisors is an integer number (7871396).

Almost surely, 2^117947709 is an apocalyptic number.

It is an amenable number.

117947709 is a deficient number, since it is larger than the sum of its proper divisors (70965795).

117947709 is a wasteful number, since it uses less digits than its factorization.

117947709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19609 (or 19606 counting only the distinct ones).

The product of its (nonzero) digits is 111132, while the sum is 45.

The square root of 117947709 is about 10860.3733361243. The cubic root of 117947709 is about 490.4143503403.

It can be divided in two parts, 11794 and 7709, that added together give a triangular number (19503 = T₁₉₇).

The spelling of 117947709 in words is "one hundred seventeen million, nine hundred forty-seven thousand, seven hundred nine".