123668211 has 4 divisors (see below), whose sum is σ = 164890952. Its totient is φ = 82445472.

The previous prime is 123668197. The next prime is 123668221. The reversal of 123668211 is 112866321.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 123668211 - 2⁶ = 123668147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123668221) 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 3 ways as a sum of consecutive naturals, for example, 20611366 + ... + 20611371.

It is an arithmetic number, because the mean of its divisors is an integer number (41222738).

Almost surely, 2^123668211 is an apocalyptic number.

123668211 is a deficient number, since it is larger than the sum of its proper divisors (41222741).

123668211 is an equidigital number, since it uses as much as digits as its factorization.

123668211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41222740.

The product of its digits is 3456, while the sum is 30.

The square root of 123668211 is about 11120.6209808625. The cubic root of 123668211 is about 498.2179373848.

The spelling of 123668211 in words is "one hundred twenty-three million, six hundred sixty-eight thousand, two hundred eleven".