3943843 has 2 divisors, whose sum is σ = 3943844. Its totient is φ = 3943842.

The previous prime is 3943829. The next prime is 3943853. The reversal of 3943843 is 3483493.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3943843 - 2¹³ = 3935651 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3943799 and 3943808.

It is not a weakly prime, because it can be changed into another prime (3943853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1971921 + 1971922.

It is an arithmetic number, because the mean of its divisors is an integer number (1971922).

Almost surely, 2^3943843 is an apocalyptic number.

3943843 is a deficient number, since it is larger than the sum of its proper divisors (1).

3943843 is an equidigital number, since it uses as much as digits as its factorization.

3943843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 34.

The square root of 3943843 is about 1985.9111259067. The cubic root of 3943843 is about 157.9937374007.

The spelling of 3943843 in words is "three million, nine hundred forty-three thousand, eight hundred forty-three".