3999231 has 12 divisors (see below), whose sum is σ = 5794152. Its totient is φ = 2658096.

The previous prime is 3999211. The next prime is 3999239. The reversal of 3999231 is 1329993.

It is not a de Polignac number, because 3999231 - 2⁹ = 3998719 is a prime.

It is a super-2 number, since 2×3999231² = 31987697182722, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3999239) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4905 + ... + 5661.

It is an arithmetic number, because the mean of its divisors is an integer number (482846).

Almost surely, 2^3999231 is an apocalyptic number.

3999231 is a deficient number, since it is larger than the sum of its proper divisors (1794921).

3999231 is a wasteful number, since it uses less digits than its factorization.

3999231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1350 (or 1347 counting only the distinct ones).

The product of its digits is 13122, while the sum is 36.

The square root of 3999231 is about 1999.8077407591. The cubic root of 3999231 is about 158.7299319498.

The spelling of 3999231 in words is "three million, nine hundred ninety-nine thousand, two hundred thirty-one".