3959993 has 4 divisors (see below), whose sum is σ = 3973200. Its totient is φ = 3946788.

The previous prime is 3959983. The next prime is 3960007. The reversal of 3959993 is 3999593.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3959993 - 2¹⁸ = 3697849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3959953) 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, 6143 + ... + 6756.

It is an arithmetic number, because the mean of its divisors is an integer number (993300).

Almost surely, 2^3959993 is an apocalyptic number.

It is an amenable number.

3959993 is a deficient number, since it is larger than the sum of its proper divisors (13207).

3959993 is a wasteful number, since it uses less digits than its factorization.

3959993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13206.

The product of its digits is 295245, while the sum is 47.

The square root of 3959993 is about 1989.9731153963. The cubic root of 3959993 is about 158.2091046483.

The spelling of 3959993 in words is "three million, nine hundred fifty-nine thousand, nine hundred ninety-three".