12326991 has 8 divisors (see below), whose sum is σ = 17301120. Its totient is φ = 7785432.

The previous prime is 12326987. The next prime is 12327041. The reversal of 12326991 is 19962321.

12326991 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12326991 - 2² = 12326987 is a prime.

It is a super-2 number, since 2×12326991² = 303909414228162, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12326981) 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, 108075 + ... + 108188.

It is an arithmetic number, because the mean of its divisors is an integer number (2162640).

Almost surely, 2^12326991 is an apocalyptic number.

12326991 is a deficient number, since it is larger than the sum of its proper divisors (4974129).

12326991 is a wasteful number, since it uses less digits than its factorization.

12326991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216285.

The product of its digits is 5832, while the sum is 33.

The square root of 12326991 is about 3510.9814867071. The cubic root of 12326991 is about 231.0037479949.

The spelling of 12326991 in words is "twelve million, three hundred twenty-six thousand, nine hundred ninety-one".