3995863 has 4 divisors (see below), whose sum is σ = 4035528. Its totient is φ = 3956200.

The previous prime is 3995851. The next prime is 3995891. The reversal of 3995863 is 3685993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3685993 = 31 ⋅118903.

It is a cyclic number.

It is not a de Polignac number, because 3995863 - 2⁹ = 3995351 is a prime.

It is a super-2 number, since 2×3995863² = 31933842229538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3995843) 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, 19681 + ... + 19882.

It is an arithmetic number, because the mean of its divisors is an integer number (1008882).

Almost surely, 2^3995863 is an apocalyptic number.

3995863 is a deficient number, since it is larger than the sum of its proper divisors (39665).

3995863 is a wasteful number, since it uses less digits than its factorization.

3995863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39664.

The product of its digits is 174960, while the sum is 43.

The square root of 3995863 is about 1998.9654824434. The cubic root of 3995863 is about 158.6853606680.

The spelling of 3995863 in words is "three million, nine hundred ninety-five thousand, eight hundred sixty-three".