12331909 has 2 divisors, whose sum is σ = 12331910. Its totient is φ = 12331908.

The previous prime is 12331903. The next prime is 12331951. The reversal of 12331909 is 90913321.

12331909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11764900 + 567009 = 3430^2 + 753^2 .

It is an emirp because it is prime and its reverse (90913321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12331909 - 2¹⁵ = 12299141 is a prime.

It is a super-3 number, since 3×12331909³ (a number of 22 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12331903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6165954 + 6165955.

It is an arithmetic number, because the mean of its divisors is an integer number (6165955).

Almost surely, 2^12331909 is an apocalyptic number.

It is an amenable number.

12331909 is a deficient number, since it is larger than the sum of its proper divisors (1).

12331909 is an equidigital number, since it uses as much as digits as its factorization.

12331909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 12331909 is about 3511.6817908233. The cubic root of 12331909 is about 231.0344644766.

The spelling of 12331909 in words is "twelve million, three hundred thirty-one thousand, nine hundred nine".