12315943 has 2 divisors, whose sum is σ = 12315944. Its totient is φ = 12315942.

The previous prime is 12315929. The next prime is 12315967. The reversal of 12315943 is 34951321.

12315943 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12315943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12315643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6157971 + 6157972.

It is an arithmetic number, because the mean of its divisors is an integer number (6157972).

Almost surely, 2^12315943 is an apocalyptic number.

12315943 is a deficient number, since it is larger than the sum of its proper divisors (1).

12315943 is an equidigital number, since it uses as much as digits as its factorization.

12315943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 28.

The square root of 12315943 is about 3509.4077847979. The cubic root of 12315943 is about 230.9347154080.

The spelling of 12315943 in words is "twelve million, three hundred fifteen thousand, nine hundred forty-three".