12378943 has 4 divisors (see below), whose sum is σ = 12411648. Its totient is φ = 12346240.

The previous prime is 12378917. The next prime is 12378997. The reversal of 12378943 is 34987321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34987321 = 941 ⋅37181.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12378943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12378043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15778 + ... + 16543.

It is an arithmetic number, because the mean of its divisors is an integer number (3102912).

Almost surely, 2^12378943 is an apocalyptic number.

12378943 is a deficient number, since it is larger than the sum of its proper divisors (32705).

12378943 is an equidigital number, since it uses as much as digits as its factorization.

12378943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32704.

The product of its digits is 36288, while the sum is 37.

The square root of 12378943 is about 3518.3722088489. The cubic root of 12378943 is about 231.3278142805.

The spelling of 12378943 in words is "twelve million, three hundred seventy-eight thousand, nine hundred forty-three".