3994493443 has 4 divisors (see below), whose sum is σ = 4204729960. Its totient is φ = 3784256928.

The previous prime is 3994493423. The next prime is 3994493479. The reversal of 3994493443 is 3443944993.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3994493443 - 2²⁵ = 3960939011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3994493423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105118230 + ... + 105118267.

It is an arithmetic number, because the mean of its divisors is an integer number (1051182490).

Almost surely, 2^3994493443 is an apocalyptic number.

3994493443 is a deficient number, since it is larger than the sum of its proper divisors (210236517).

3994493443 is a wasteful number, since it uses less digits than its factorization.

3994493443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210236516.

The product of its digits is 5038848, while the sum is 52.

The square root of 3994493443 is about 63202.0050552196. The cubic root of 3994493443 is about 1586.6722912544.

The spelling of 3994493443 in words is "three billion, nine hundred ninety-four million, four hundred ninety-three thousand, four hundred forty-three".