165393517 has 8 divisors (see below), whose sum is σ = 169779456. Its totient is φ = 161043792.

The previous prime is 165393491. The next prime is 165393521. The reversal of 165393517 is 715393561.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165393517 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 165393517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165393317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 328 + ... + 18190.

It is an arithmetic number, because the mean of its divisors is an integer number (21222432).

Almost surely, 2^165393517 is an apocalyptic number.

It is an amenable number.

165393517 is a deficient number, since it is larger than the sum of its proper divisors (4385939).

165393517 is a wasteful number, since it uses less digits than its factorization.

165393517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18107.

The product of its digits is 85050, while the sum is 40.

The square root of 165393517 is about 12860.5410850399. The cubic root of 165393517 is about 548.9163423190.

The spelling of 165393517 in words is "one hundred sixty-five million, three hundred ninety-three thousand, five hundred seventeen".