3989399 has 4 divisors (see below), whose sum is σ = 4029000. Its totient is φ = 3949800.

The previous prime is 3989393. The next prime is 3989413. The reversal of 3989399 is 9939893.

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 3989399 - 2⁴ = 3989383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3989393) 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, 19649 + ... + 19850.

It is an arithmetic number, because the mean of its divisors is an integer number (1007250).

Almost surely, 2^3989399 is an apocalyptic number.

3989399 is a deficient number, since it is larger than the sum of its proper divisors (39601).

3989399 is a wasteful number, since it uses less digits than its factorization.

3989399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39600.

The product of its digits is 472392, while the sum is 50.

The square root of 3989399 is about 1997.3479917130. The cubic root of 3989399 is about 158.5997474747.

The spelling of 3989399 in words is "three million, nine hundred eighty-nine thousand, three hundred ninety-nine".