123320165 has 16 divisors (see below), whose sum is σ = 156409920. Its totient is φ = 93081600.

The previous prime is 123320161. The next prime is 123320189. The reversal of 123320165 is 561023321.

It is not a de Polignac number, because 123320165 - 2² = 123320161 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123320165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123320161) 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 15 ways as a sum of consecutive naturals, for example, 21890 + ... + 26940.

It is an arithmetic number, because the mean of its divisors is an integer number (9775620).

Almost surely, 2^123320165 is an apocalyptic number.

It is an amenable number.

123320165 is a deficient number, since it is larger than the sum of its proper divisors (33089755).

123320165 is a wasteful number, since it uses less digits than its factorization.

123320165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5332.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 123320165 is about 11104.9612786358. The cubic root of 123320165 is about 497.7501111859.

Adding to 123320165 its reverse (561023321), we get a palindrome (684343486).

The spelling of 123320165 in words is "one hundred twenty-three million, three hundred twenty thousand, one hundred sixty-five".