12328931 has 4 divisors (see below), whose sum is σ = 12339672. Its totient is φ = 12318192.

The previous prime is 12328919. The next prime is 12328933. The reversal of 12328931 is 13982321.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12328931 - 2⁶ = 12328867 is a prime.

It is a super-3 number, since 3×12328931³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12328894 and 12328903.

It is not an unprimeable number, because it can be changed into a prime (12328933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3410 + ... + 6023.

It is an arithmetic number, because the mean of its divisors is an integer number (3084918).

Almost surely, 2^12328931 is an apocalyptic number.

12328931 is a deficient number, since it is larger than the sum of its proper divisors (10741).

12328931 is an equidigital number, since it uses as much as digits as its factorization.

12328931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10740.

The product of its digits is 2592, while the sum is 29.

The square root of 12328931 is about 3511.2577518604. The cubic root of 12328931 is about 231.0158656794.

The spelling of 12328931 in words is "twelve million, three hundred twenty-eight thousand, nine hundred thirty-one".