165289423 has 8 divisors (see below), whose sum is σ = 178144400. Its totient is φ = 152454528.

The previous prime is 165289403. The next prime is 165289433. The reversal of 165289423 is 324982561.

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 165289423 - 2⁵ = 165289391 is a prime.

It is a super-3 number, since 3×165289423³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165289403) 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, 15088 + ... + 23626.

It is an arithmetic number, because the mean of its divisors is an integer number (22268050).

Almost surely, 2^165289423 is an apocalyptic number.

165289423 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

165289423 is a deficient number, since it is larger than the sum of its proper divisors (12854977).

165289423 is a wasteful number, since it uses less digits than its factorization.

165289423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10041.

The product of its digits is 103680, while the sum is 40.

The square root of 165289423 is about 12856.4934177248. The cubic root of 165289423 is about 548.8011606800.

The spelling of 165289423 in words is "one hundred sixty-five million, two hundred eighty-nine thousand, four hundred twenty-three".