123312309 has 8 divisors (see below), whose sum is σ = 164579712. Its totient is φ = 82126560.

The previous prime is 123312307. The next prime is 123312331. The reversal of 123312309 is 903213321.

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

It is not a de Polignac number, because 123312309 - 2¹ = 123312307 is a prime.

It is a super-3 number, since 3×123312309³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123312307) 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, 16797 + ... + 22994.

It is an arithmetic number, because the mean of its divisors is an integer number (20572464).

Almost surely, 2^123312309 is an apocalyptic number.

It is an amenable number.

123312309 is a deficient number, since it is larger than the sum of its proper divisors (41267403).

123312309 is a wasteful number, since it uses less digits than its factorization.

123312309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40827.

The product of its (nonzero) digits is 972, while the sum is 24.

The square root of 123312309 is about 11104.6075572260. The cubic root of 123312309 is about 497.7395413873.

The spelling of 123312309 in words is "one hundred twenty-three million, three hundred twelve thousand, three hundred nine".