12231909 has 12 divisors (see below), whose sum is σ = 18079776. Its totient is φ = 7964712.

The previous prime is 12231889. The next prime is 12231917. The reversal of 12231909 is 90913221.

It is not a de Polignac number, because 12231909 - 2⁹ = 12231397 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12231509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15417 + ... + 16190.

It is an arithmetic number, because the mean of its divisors is an integer number (1506648).

Almost surely, 2^12231909 is an apocalyptic number.

It is an amenable number.

12231909 is a deficient number, since it is larger than the sum of its proper divisors (5847867).

12231909 is a wasteful number, since it uses less digits than its factorization.

12231909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31656 (or 31653 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 12231909 is about 3497.4146165418. The cubic root of 12231909 is about 230.4082792345.

The spelling of 12231909 in words is "twelve million, two hundred thirty-one thousand, nine hundred nine".