3943887 has 8 divisors (see below), whose sum is σ = 5535360. Its totient is φ = 2490840.

The previous prime is 3943883. The next prime is 3943921. The reversal of 3943887 is 7883493.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3943887 - 2² = 3943883 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3943883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34539 + ... + 34652.

It is an arithmetic number, because the mean of its divisors is an integer number (691920).

Almost surely, 2^3943887 is an apocalyptic number.

3943887 is a deficient number, since it is larger than the sum of its proper divisors (1591473).

3943887 is a wasteful number, since it uses less digits than its factorization.

3943887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69213.

The product of its digits is 145152, while the sum is 42.

The square root of 3943887 is about 1985.9222039143. The cubic root of 3943887 is about 157.9943249577.

The spelling of 3943887 in words is "three million, nine hundred forty-three thousand, eight hundred eighty-seven".