117909517 has 4 divisors (see below), whose sum is σ = 128628576. Its totient is φ = 107190460.

The previous prime is 117909503. The next prime is 117909541. The reversal of 117909517 is 715909711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 117909517 - 2¹¹ = 117907469 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 117909517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117909217) 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 3 ways as a sum of consecutive naturals, for example, 5359513 + ... + 5359534.

It is an arithmetic number, because the mean of its divisors is an integer number (32157144).

Almost surely, 2^117909517 is an apocalyptic number.

It is an amenable number.

117909517 is a deficient number, since it is larger than the sum of its proper divisors (10719059).

117909517 is a wasteful number, since it uses less digits than its factorization.

117909517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10719058.

The product of its (nonzero) digits is 19845, while the sum is 40.

The square root of 117909517 is about 10858.6148748356. The cubic root of 117909517 is about 490.3614118334.

The spelling of 117909517 in words is "one hundred seventeen million, nine hundred nine thousand, five hundred seventeen".