3869943 has 24 divisors (see below), whose sum is σ = 6486144. Its totient is φ = 2009040.

The previous prime is 3869917. The next prime is 3869959. The reversal of 3869943 is 3499683.

It is not a de Polignac number, because 3869943 - 2⁸ = 3869687 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3869895 and 3869904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3869993) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1780 + ... + 3302.

It is an arithmetic number, because the mean of its divisors is an integer number (270256).

Almost surely, 2^3869943 is an apocalyptic number.

3869943 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

3869943 is a deficient number, since it is larger than the sum of its proper divisors (2616201).

3869943 is a wasteful number, since it uses less digits than its factorization.

3869943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1555 (or 1544 counting only the distinct ones).

The product of its digits is 139968, while the sum is 42.

The square root of 3869943 is about 1967.2170698731. The cubic root of 3869943 is about 157.0006761570. Note that the first 3 decimals are identical.

The spelling of 3869943 in words is "three million, eight hundred sixty-nine thousand, nine hundred forty-three".