3977866 has 4 divisors (see below), whose sum is σ = 5966802. Its totient is φ = 1988932.

The previous prime is 3977863. The next prime is 3977867. The reversal of 3977866 is 6687793.

3977866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 3884841 + 93025 = 1971^2 + 305^2 .

It is not an unprimeable number, because it can be changed into a prime (3977863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 994465 + ... + 994468.

Almost surely, 2^3977866 is an apocalyptic number.

3977866 is a deficient number, since it is larger than the sum of its proper divisors (1988936).

3977866 is a wasteful number, since it uses less digits than its factorization.

3977866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1988935.

The product of its digits is 381024, while the sum is 46.

The square root of 3977866 is about 1994.4588238417. The cubic root of 3977866 is about 158.4467673439.

The spelling of 3977866 in words is "three million, nine hundred seventy-seven thousand, eight hundred sixty-six".