123388005 has 32 divisors (see below), whose sum is σ = 213212160. Its totient is φ = 60572160.

The previous prime is 123388003. The next prime is 123388009. The reversal of 123388005 is 500883321.

It is a happy number.

It is not a de Polignac number, because 123388005 - 2¹ = 123388003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123388003) 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, 92745 + ... + 94065.

It is an arithmetic number, because the mean of its divisors is an integer number (6662880).

Almost surely, 2^123388005 is an apocalyptic number.

123388005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123388005 is a deficient number, since it is larger than the sum of its proper divisors (89824155).

123388005 is a wasteful number, since it uses less digits than its factorization.

123388005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1821.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 123388005 is about 11108.0153492872. The cubic root of 123388005 is about 497.8413673550.

The spelling of 123388005 in words is "one hundred twenty-three million, three hundred eighty-eight thousand, five".