123920123 has 8 divisors (see below), whose sum is σ = 132244992. Its totient is φ = 115710336.

The previous prime is 123920117. The next prime is 123920149. The reversal of 123920123 is 321029321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123920123 - 2⁸ = 123919867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123920183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26540 + ... + 30857.

It is an arithmetic number, because the mean of its divisors is an integer number (16530624).

Almost surely, 2^123920123 is an apocalyptic number.

123920123 is a deficient number, since it is larger than the sum of its proper divisors (8324869).

123920123 is a wasteful number, since it uses less digits than its factorization.

123920123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57541.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 123920123 is about 11131.9415647047. The cubic root of 123920123 is about 498.5559977295. Note that the first 3 decimals are identical.

Adding to 123920123 its reverse (321029321), we get a palindrome (444949444).

The spelling of 123920123 in words is "one hundred twenty-three million, nine hundred twenty thousand, one hundred twenty-three".