3899943 has 12 divisors (see below), whose sum is σ = 5650528. Its totient is φ = 2592000.

The previous prime is 3899941. The next prime is 3899947. The reversal of 3899943 is 3499983.

3899943 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3899943 - 2¹ = 3899941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3899941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4818 + ... + 5568.

Almost surely, 2^3899943 is an apocalyptic number.

3899943 is a deficient number, since it is larger than the sum of its proper divisors (1750585).

3899943 is a wasteful number, since it uses less digits than its factorization.

3899943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334 (or 1331 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 3899943 is about 1974.8273342244. The cubic root of 3899943 is about 157.4053248092.

The spelling of 3899943 in words is "three million, eight hundred ninety-nine thousand, nine hundred forty-three".