12321993 has 8 divisors (see below), whose sum is σ = 16589248. Its totient is φ = 8134704.

The previous prime is 12321989. The next prime is 12322001. The reversal of 12321993 is 39912321.

It is a happy number.

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

It is not a de Polignac number, because 12321993 - 2² = 12321989 is a prime.

It is a super-2 number, since 2×12321993² = 303663022984098, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12321993.

It is not an unprimeable number, because it can be changed into a prime (12321193) 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, 19630 + ... + 20247.

It is an arithmetic number, because the mean of its divisors is an integer number (2073656).

Almost surely, 2^12321993 is an apocalyptic number.

It is an amenable number.

12321993 is a deficient number, since it is larger than the sum of its proper divisors (4267255).

12321993 is a wasteful number, since it uses less digits than its factorization.

12321993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39983.

The product of its digits is 2916, while the sum is 30.

The square root of 12321993 is about 3510.2696477621. The cubic root of 12321993 is about 230.9725234837.

The spelling of 12321993 in words is "twelve million, three hundred twenty-one thousand, nine hundred ninety-three".