123868681 has 16 divisors (see below), whose sum is σ = 134956800. Its totient is φ = 113234688.

The previous prime is 123868673. The next prime is 123868691. The reversal of 123868681 is 186868321.

It is not a de Polignac number, because 123868681 - 2³ = 123868673 is a prime.

It is a super-2 number, since 2×123868681² = 30686900265359522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123868631) 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 15 ways as a sum of consecutive naturals, for example, 174355 + ... + 175063.

It is an arithmetic number, because the mean of its divisors is an integer number (8434800).

Almost surely, 2^123868681 is an apocalyptic number.

It is an amenable number.

123868681 is a deficient number, since it is larger than the sum of its proper divisors (11088119).

123868681 is a wasteful number, since it uses less digits than its factorization.

123868681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008.

The product of its digits is 110592, while the sum is 43.

The square root of 123868681 is about 11129.6307665618. The cubic root of 123868681 is about 498.4870009524.

The spelling of 123868681 in words is "one hundred twenty-three million, eight hundred sixty-eight thousand, six hundred eighty-one".