3996999 has 16 divisors (see below), whose sum is σ = 6083040. Its totient is φ = 2592000.

The previous prime is 3996977. The next prime is 3997001. The reversal of 3996999 is 9996993.

It is not a de Polignac number, because 3996999 - 2⁸ = 3996743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3996919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1002 + ... + 2999.

It is an arithmetic number, because the mean of its divisors is an integer number (380190).

Almost surely, 2^3996999 is an apocalyptic number.

3996999 is a deficient number, since it is larger than the sum of its proper divisors (2086041).

3996999 is a wasteful number, since it uses less digits than its factorization.

3996999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4047 (or 4041 counting only the distinct ones).

The product of its digits is 1062882, while the sum is 54.

The square root of 3996999 is about 1999.2496092284. The cubic root of 3996999 is about 158.7003970102.

It can be divided in two parts, 3996 and 999, that multiplied together give a square (3992004 = 1998²).

The spelling of 3996999 in words is "three million, nine hundred ninety-six thousand, nine hundred ninety-nine".