3997982 has 4 divisors (see below), whose sum is σ = 5996976. Its totient is φ = 1998990.

The previous prime is 3997979. The next prime is 3997993. The reversal of 3997982 is 2897993.

It is a semiprime because it is the product of two primes.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 999494 + ... + 999497.

It is an arithmetic number, because the mean of its divisors is an integer number (1499244).

Almost surely, 2^3997982 is an apocalyptic number.

3997982 is a deficient number, since it is larger than the sum of its proper divisors (1998994).

3997982 is a wasteful number, since it uses less digits than its factorization.

3997982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1998993.

The product of its digits is 244944, while the sum is 47.

The square root of 3997982 is about 1999.4954363539. The cubic root of 3997982 is about 158.7134059120.

The spelling of 3997982 in words is "three million, nine hundred ninety-seven thousand, nine hundred eighty-two".