3968999 has 4 divisors (see below), whose sum is σ = 3978480. Its totient is φ = 3959520.

The previous prime is 3968983. The next prime is 3969001. The reversal of 3968999 is 9998693.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3968999 - 2⁴ = 3968983 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3968999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3968299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4082 + ... + 4959.

It is an arithmetic number, because the mean of its divisors is an integer number (994620).

Almost surely, 2^3968999 is an apocalyptic number.

3968999 is a deficient number, since it is larger than the sum of its proper divisors (9481).

3968999 is an equidigital number, since it uses as much as digits as its factorization.

3968999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9480.

The product of its digits is 944784, while the sum is 53.

The square root of 3968999 is about 1992.2346749316. The cubic root of 3968999 is about 158.3289493400.

The spelling of 3968999 in words is "three million, nine hundred sixty-eight thousand, nine hundred ninety-nine".