165623323 has 8 divisors (see below), whose sum is σ = 174774800. Its totient is φ = 156515328.

The previous prime is 165623317. The next prime is 165623327. The reversal of 165623323 is 323326561.

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 not a de Polignac number, because 165623323 - 2⁵ = 165623291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165623327) 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, 2886 + ... + 18427.

It is an arithmetic number, because the mean of its divisors is an integer number (21846850).

Almost surely, 2^165623323 is an apocalyptic number.

165623323 is a deficient number, since it is larger than the sum of its proper divisors (9151477).

165623323 is a wasteful number, since it uses less digits than its factorization.

165623323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21741.

The product of its digits is 19440, while the sum is 31.

The square root of 165623323 is about 12869.4725222132. The cubic root of 165623323 is about 549.1704552423.

Adding to 165623323 its reverse (323326561), we get a palindrome (488949884).

The spelling of 165623323 in words is "one hundred sixty-five million, six hundred twenty-three thousand, three hundred twenty-three".