7842943 has 2 divisors, whose sum is σ = 7842944. Its totient is φ = 7842942.

The previous prime is 7842917. The next prime is 7842949. The reversal of 7842943 is 3492487.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (3492487) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7842943 - 2⁹ = 7842431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7842949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3921471 + 3921472.

It is an arithmetic number, because the mean of its divisors is an integer number (3921472).

Almost surely, 2^7842943 is an apocalyptic number.

7842943 is a deficient number, since it is larger than the sum of its proper divisors (1).

7842943 is an equidigital number, since it uses as much as digits as its factorization.

7842943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 37.

The square root of 7842943 is about 2800.5254864043. The cubic root of 7842943 is about 198.6825321148.

The spelling of 7842943 in words is "seven million, eight hundred forty-two thousand, nine hundred forty-three".