3870943 has 4 divisors (see below), whose sum is σ = 3875128. Its totient is φ = 3866760.

The previous prime is 3870941. The next prime is 3870947. The reversal of 3870943 is 3490783.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3490783 = 43 ⋅81181.

It is a cyclic number.

It is not a de Polignac number, because 3870943 - 2¹ = 3870941 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3870899 and 3870908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3870941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21 + ... + 2782.

It is an arithmetic number, because the mean of its divisors is an integer number (968782).

Almost surely, 2^3870943 is an apocalyptic number.

3870943 is a deficient number, since it is larger than the sum of its proper divisors (4185).

3870943 is a wasteful number, since it uses less digits than its factorization.

3870943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4184.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 3870943 is about 1967.4712196116. The cubic root of 3870943 is about 157.0141980750.

The spelling of 3870943 in words is "three million, eight hundred seventy thousand, nine hundred forty-three".