123961668 has 12 divisors (see below), whose sum is σ = 289243920. Its totient is φ = 41320552.

The previous prime is 123961661. The next prime is 123961703. The reversal of 123961668 is 866169321.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (123961661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5165058 + ... + 5165081.

It is an arithmetic number, because the mean of its divisors is an integer number (24103660).

Almost surely, 2^123961668 is an apocalyptic number.

It is an amenable number.

123961668 is an abundant number, since it is smaller than the sum of its proper divisors (165282252).

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

123961668 is a wasteful number, since it uses less digits than its factorization.

123961668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10330146 (or 10330144 counting only the distinct ones).

The product of its digits is 93312, while the sum is 42.

The square root of 123961668 is about 11133.8074350152. The cubic root of 123961668 is about 498.6117061815.

The spelling of 123961668 in words is "one hundred twenty-three million, nine hundred sixty-one thousand, six hundred sixty-eight".