3869805943 has 4 divisors (see below), whose sum is σ = 4073479960. Its totient is φ = 3666131928.

The previous prime is 3869805889. The next prime is 3869805949. The reversal of 3869805943 is 3495089683.

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

It is not a de Polignac number, because 3869805943 - 2¹⁷ = 3869674871 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 (3869805949) 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, 101836980 + ... + 101837017.

It is an arithmetic number, because the mean of its divisors is an integer number (1018369990).

Almost surely, 2^3869805943 is an apocalyptic number.

3869805943 is a deficient number, since it is larger than the sum of its proper divisors (203674017).

3869805943 is a wasteful number, since it uses less digits than its factorization.

3869805943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203674016.

The product of its (nonzero) digits is 5598720, while the sum is 55.

The square root of 3869805943 is about 62207.7643305078. The cubic root of 3869805943 is about 1569.9882270203.

The spelling of 3869805943 in words is "three billion, eight hundred sixty-nine million, eight hundred five thousand, nine hundred forty-three".