3994536443 has 2 divisors, whose sum is σ = 3994536444. Its totient is φ = 3994536442.

The previous prime is 3994536437. The next prime is 3994536463. The reversal of 3994536443 is 3446354993.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3994536443 - 2⁶ = 3994536379 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 3994536391 and 3994536400.

It is not a weakly prime, because it can be changed into another prime (3994536433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1997268221 + 1997268222.

It is an arithmetic number, because the mean of its divisors is an integer number (1997268222).

Almost surely, 2^3994536443 is an apocalyptic number.

3994536443 is a deficient number, since it is larger than the sum of its proper divisors (1).

3994536443 is an equidigital number, since it uses as much as digits as its factorization.

3994536443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4199040, while the sum is 50.

The square root of 3994536443 is about 63202.3452333851. The cubic root of 3994536443 is about 1586.6779846475.

The spelling of 3994536443 in words is "three billion, nine hundred ninety-four million, five hundred thirty-six thousand, four hundred forty-three".