123388311 has 16 divisors (see below), whose sum is σ = 168926688. Its totient is φ = 80064000.

The previous prime is 123388297. The next prime is 123388313. The reversal of 123388311 is 113883321.

It is not a de Polignac number, because 123388311 - 2⁷ = 123388183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123388313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67611 + ... + 69411.

It is an arithmetic number, because the mean of its divisors is an integer number (10557918).

Almost surely, 2^123388311 is an apocalyptic number.

123388311 is a deficient number, since it is larger than the sum of its proper divisors (45538377).

123388311 is a wasteful number, since it uses less digits than its factorization.

123388311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2402.

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

The square root of 123388311 is about 11108.0291231163. The cubic root of 123388311 is about 497.8417789005.

The spelling of 123388311 in words is "one hundred twenty-three million, three hundred eighty-eight thousand, three hundred eleven".