3997863 has 16 divisors (see below), whose sum is σ = 5955840. Its totient is φ = 2650392.

The previous prime is 3997859. The next prime is 3997871. The reversal of 3997863 is 3687993.

It is a happy number.

It is not a de Polignac number, because 3997863 - 2² = 3997859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3997463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6820 + ... + 7382.

It is an arithmetic number, because the mean of its divisors is an integer number (372240).

Almost surely, 2^3997863 is an apocalyptic number.

3997863 is a deficient number, since it is larger than the sum of its proper divisors (1957977).

3997863 is a wasteful number, since it uses less digits than its factorization.

3997863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835 (or 829 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 3997863 is about 1999.4656786252. The cubic root of 3997863 is about 158.7118311940.

The spelling of 3997863 in words is "three million, nine hundred ninety-seven thousand, eight hundred sixty-three".