117800165 has 24 divisors (see below), whose sum is σ = 165117600. Its totient is φ = 80444448.

The previous prime is 117800161. The next prime is 117800197. The reversal of 117800165 is 561008711.

It is not a de Polignac number, because 117800165 - 2² = 117800161 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117800161) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68486 + ... + 70184.

It is an arithmetic number, because the mean of its divisors is an integer number (6879900).

Almost surely, 2^117800165 is an apocalyptic number.

It is an amenable number.

117800165 is a deficient number, since it is larger than the sum of its proper divisors (47317435).

117800165 is a wasteful number, since it uses less digits than its factorization.

117800165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2001 (or 1994 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 29.

The square root of 117800165 is about 10853.5784421545. The cubic root of 117800165 is about 490.2097741263.

Adding to 117800165 its reverse (561008711), we get a palindrome (678808876).

The spelling of 117800165 in words is "one hundred seventeen million, eight hundred thousand, one hundred sixty-five".