123115668 has 96 divisors (see below), whose sum is σ = 330691200. Its totient is φ = 35334144.

The previous prime is 123115639. The next prime is 123115669. The reversal of 123115668 is 866511321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123115669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 216088 + ... + 216656.

It is an arithmetic number, because the mean of its divisors is an integer number (3444700).

Almost surely, 2^123115668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123115668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165345600).

123115668 is an abundant number, since it is smaller than the sum of its proper divisors (207575532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123115668 is a wasteful number, since it uses less digits than its factorization.

123115668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681 (or 679 counting only the distinct ones).

The product of its digits is 8640, while the sum is 33.

The square root of 123115668 is about 11095.7499971836. The cubic root of 123115668 is about 497.4748257928.

Adding to 123115668 its reverse (866511321), we get a palindrome (989626989).

The spelling of 123115668 in words is "one hundred twenty-three million, one hundred fifteen thousand, six hundred sixty-eight".