12031329 has 4 divisors (see below), whose sum is σ = 16041776. Its totient is φ = 8020884.

The previous prime is 12031319. The next prime is 12031337. The reversal of 12031329 is 92313021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 92313021 = 3 ⋅30771007.

It is not a de Polignac number, because 12031329 - 2⁵ = 12031297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12031319) 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 3 ways as a sum of consecutive naturals, for example, 2005219 + ... + 2005224.

It is an arithmetic number, because the mean of its divisors is an integer number (4010444).

Almost surely, 2^12031329 is an apocalyptic number.

It is an amenable number.

12031329 is a deficient number, since it is larger than the sum of its proper divisors (4010447).

12031329 is an equidigital number, since it uses as much as digits as its factorization.

12031329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4010446.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 12031329 is about 3468.6206192087. The cubic root of 12031329 is about 229.1419128892.

The spelling of 12031329 in words is "twelve million, thirty-one thousand, three hundred twenty-nine".