3993943 has 2 divisors, whose sum is σ = 3993944. Its totient is φ = 3993942.

The previous prime is 3993911. The next prime is 3993949. The reversal of 3993943 is 3493993.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3993943 - 2⁵ = 3993911 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3993896 and 3993905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3993949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1996971 + 1996972.

It is an arithmetic number, because the mean of its divisors is an integer number (1996972).

Almost surely, 2^3993943 is an apocalyptic number.

3993943 is a deficient number, since it is larger than the sum of its proper divisors (1).

3993943 is an equidigital number, since it uses as much as digits as its factorization.

3993943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 78732, while the sum is 40.

The square root of 3993943 is about 1998.4851763273. The cubic root of 3993943 is about 158.6599406520.

The spelling of 3993943 in words is "three million, nine hundred ninety-three thousand, nine hundred forty-three".