165799173 has 8 divisors (see below), whose sum is σ = 221133888. Its totient is φ = 110498624.

The previous prime is 165799163. The next prime is 165799189. The reversal of 165799173 is 371997561.

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

It is a cyclic number.

It is not a de Polignac number, because 165799173 - 2⁵ = 165799141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165799163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6640 + ... + 19382.

It is an arithmetic number, because the mean of its divisors is an integer number (27641736).

Almost surely, 2^165799173 is an apocalyptic number.

It is an amenable number.

165799173 is a deficient number, since it is larger than the sum of its proper divisors (55334715).

165799173 is a wasteful number, since it uses less digits than its factorization.

165799173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17083.

The product of its digits is 357210, while the sum is 48.

The square root of 165799173 is about 12876.3027690405. The cubic root of 165799173 is about 549.3647464503.

It can be divided in two parts, 16579 and 9173, that added together give a palindrome (25752).

The spelling of 165799173 in words is "one hundred sixty-five million, seven hundred ninety-nine thousand, one hundred seventy-three".