123005109 has 8 divisors (see below), whose sum is σ = 164085472. Its totient is φ = 81964080.

The previous prime is 123005093. The next prime is 123005123. The reversal of 123005109 is 901500321.

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

It is not a de Polignac number, because 123005109 - 2⁴ = 123005093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123005009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1534 + ... + 15759.

It is an arithmetic number, because the mean of its divisors is an integer number (20510684).

Almost surely, 2^123005109 is an apocalyptic number.

It is an amenable number.

123005109 is a deficient number, since it is larger than the sum of its proper divisors (41080363).

123005109 is a wasteful number, since it uses less digits than its factorization.

123005109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19667.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 123005109 is about 11090.7668355258. The cubic root of 123005109 is about 497.3258688757.

The spelling of 123005109 in words is "one hundred twenty-three million, five thousand, one hundred nine".