8400943 has 2 divisors, whose sum is σ = 8400944. Its totient is φ = 8400942.

The previous prime is 8400937. The next prime is 8400967. The reversal of 8400943 is 3490048.

8400943 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-8400943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8400043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4200471 + 4200472.

It is an arithmetic number, because the mean of its divisors is an integer number (4200472).

Almost surely, 2^8400943 is an apocalyptic number.

8400943 is a deficient number, since it is larger than the sum of its proper divisors (1).

8400943 is an equidigital number, since it uses as much as digits as its factorization.

8400943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 8400943 is about 2898.4380276280. The cubic root of 8400943 is about 203.2868779177.

The spelling of 8400943 in words is "eight million, four hundred thousand, nine hundred forty-three".