123123005 has 4 divisors (see below), whose sum is σ = 147747612. Its totient is φ = 98498400.

The previous prime is 123122981. The next prime is 123123023. The reversal of 123123005 is 500321321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 500321321 = 337 ⋅1484633.

It can be written as a sum of positive squares in 2 ways, for example, as 35307364 + 87815641 = 5942^2 + 9371^2 .

It is not a de Polignac number, because 123123005 - 2⁶ = 123122941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 12312296 + ... + 12312305.

It is an arithmetic number, because the mean of its divisors is an integer number (36936903).

Almost surely, 2^123123005 is an apocalyptic number.

It is an amenable number.

123123005 is a deficient number, since it is larger than the sum of its proper divisors (24624607).

123123005 is an equidigital number, since it uses as much as digits as its factorization.

123123005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24624606.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 123123005 is about 11096.0806143431. The cubic root of 123123005 is about 497.4847078286.

Adding to 123123005 its reverse (500321321), we get a palindrome (623444326).

The spelling of 123123005 in words is "one hundred twenty-three million, one hundred twenty-three thousand, five".