123168321 has 6 divisors (see below), whose sum is σ = 177909810. Its totient is φ = 82112208.

The previous prime is 123168319. The next prime is 123168323. The reversal of 123168321 is 123861321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (123168319) and next prime (123168323).

It can be written as a sum of positive squares in only one way, i.e., 114383025 + 8785296 = 10695^2 + 2964^2 .

It is not a de Polignac number, because 123168321 - 2¹ = 123168319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123168323) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6842676 + ... + 6842693.

It is an arithmetic number, because the mean of its divisors is an integer number (29651635).

Almost surely, 2^123168321 is an apocalyptic number.

It is an amenable number.

123168321 is a deficient number, since it is larger than the sum of its proper divisors (54741489).

123168321 is a wasteful number, since it uses less digits than its factorization.

123168321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13685375 (or 13685372 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 123168321 is about 11098.1224087681. The cubic root of 123168321 is about 497.5457342029.

The spelling of 123168321 in words is "one hundred twenty-three million, one hundred sixty-eight thousand, three hundred twenty-one".