117805165 has 16 divisors (see below), whose sum is σ = 145145088. Its totient is φ = 91740096.

The previous prime is 117805147. The next prime is 117805169. The reversal of 117805165 is 561508711.

It is a cyclic number.

It is not a de Polignac number, because 117805165 - 2⁵ = 117805133 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 117805165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117805169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78159 + ... + 79651.

It is an arithmetic number, because the mean of its divisors is an integer number (9071568).

Almost surely, 2^117805165 is an apocalyptic number.

It is an amenable number.

117805165 is a deficient number, since it is larger than the sum of its proper divisors (27339923).

117805165 is a wasteful number, since it uses less digits than its factorization.

117805165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1908.

The product of its (nonzero) digits is 8400, while the sum is 34.

The square root of 117805165 is about 10853.8087784888. The cubic root of 117805165 is about 490.2167096406.

The spelling of 117805165 in words is "one hundred seventeen million, eight hundred five thousand, one hundred sixty-five".