3993831 has 6 divisors (see below), whose sum is σ = 5768880. Its totient is φ = 2662548.

The previous prime is 3993791. The next prime is 3993833. The reversal of 3993831 is 1383993.

It is not a de Polignac number, because 3993831 - 2¹⁴ = 3977447 is a prime.

It is a super-3 number, since 3×3993831³ (a number of 21 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3993833) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 221871 + ... + 221888.

It is an arithmetic number, because the mean of its divisors is an integer number (961480).

Almost surely, 2^3993831 is an apocalyptic number.

3993831 is a deficient number, since it is larger than the sum of its proper divisors (1775049).

3993831 is a wasteful number, since it uses less digits than its factorization.

3993831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443765 (or 443762 counting only the distinct ones).

The product of its digits is 17496, while the sum is 36.

The square root of 3993831 is about 1998.4571549073. The cubic root of 3993831 is about 158.6584575663.

The spelling of 3993831 in words is "three million, nine hundred ninety-three thousand, eight hundred thirty-one".