165168913 has 8 divisors (see below), whose sum is σ = 203284928. Its totient is φ = 130683024.

The previous prime is 165168893. The next prime is 165168917. The reversal of 165168913 is 319861561.

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 165168913 - 2²⁵ = 131614481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165168917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 907431 + ... + 907612.

It is an arithmetic number, because the mean of its divisors is an integer number (25410616).

Almost surely, 2^165168913 is an apocalyptic number.

165168913 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

165168913 is a deficient number, since it is larger than the sum of its proper divisors (38116015).

165168913 is a wasteful number, since it uses less digits than its factorization.

165168913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1815063.

The product of its digits is 38880, while the sum is 40.

The square root of 165168913 is about 12851.8058264199. The cubic root of 165168913 is about 548.6677540648.

The spelling of 165168913 in words is "one hundred sixty-five million, one hundred sixty-eight thousand, nine hundred thirteen".