12117943 has 2 divisors, whose sum is σ = 12117944. Its totient is φ = 12117942.

The previous prime is 12117929. The next prime is 12117947. The reversal of 12117943 is 34971121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12117943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12117947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6058971 + 6058972.

It is an arithmetic number, because the mean of its divisors is an integer number (6058972).

Almost surely, 2^12117943 is an apocalyptic number.

12117943 is a deficient number, since it is larger than the sum of its proper divisors (1).

12117943 is an equidigital number, since it uses as much as digits as its factorization.

12117943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 28.

The square root of 12117943 is about 3481.0835956639. The cubic root of 12117943 is about 229.6904657830.

The spelling of 12117943 in words is "twelve million, one hundred seventeen thousand, nine hundred forty-three".