3999983 has 4 divisors (see below), whose sum is σ = 4307688. Its totient is φ = 3692280.

The previous prime is 3999971. The next prime is 4000037. The reversal of 3999983 is 3899993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3899993 = 79 ⋅49367.

It is a cyclic number.

It is not a de Polignac number, because 3999983 - 2⁸ = 3999727 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3999923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153833 + ... + 153858.

It is an arithmetic number, because the mean of its divisors is an integer number (1076922).

Almost surely, 2^3999983 is an apocalyptic number.

3999983 is a deficient number, since it is larger than the sum of its proper divisors (307705).

3999983 is a wasteful number, since it uses less digits than its factorization.

3999983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307704.

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

The square root of 3999983 is about 1999.9957499955. The cubic root of 3999983 is about 158.7398803147.

The spelling of 3999983 in words is "three million, nine hundred ninety-nine thousand, nine hundred eighty-three".