165693353 has 8 divisors (see below), whose sum is σ = 193228800. Its totient is φ = 142022580.

The previous prime is 165693349. The next prime is 165693379. The reversal of 165693353 is 353396561.

It is not a de Polignac number, because 165693353 - 2² = 165693349 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 165693353.

It is not an unprimeable number, because it can be changed into a prime (165693343) 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, 241193 + ... + 241878.

It is an arithmetic number, because the mean of its divisors is an integer number (24153600).

Almost surely, 2^165693353 is an apocalyptic number.

It is an amenable number.

165693353 is a deficient number, since it is larger than the sum of its proper divisors (27535447).

165693353 is an frugal number, since it uses more digits than its factorization.

165693353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483092 (or 483078 counting only the distinct ones).

The product of its digits is 218700, while the sum is 41.

The square root of 165693353 is about 12872.1930144012. The cubic root of 165693353 is about 549.2478456870.

The spelling of 165693353 in words is "one hundred sixty-five million, six hundred ninety-three thousand, three hundred fifty-three".