3977668 has 6 divisors (see below), whose sum is σ = 6960926. Its totient is φ = 1988832.

The previous prime is 3977663. The next prime is 3977681. The reversal of 3977668 is 8667793.

3977668 is digitally balanced in base 2 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 3968064 + 9604 = 1992^2 + 98^2 .

It is not an unprimeable number, because it can be changed into a prime (3977663) 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, 497205 + ... + 497212.

Almost surely, 2^3977668 is an apocalyptic number.

It is an amenable number.

3977668 is a deficient number, since it is larger than the sum of its proper divisors (2983258).

3977668 is a wasteful number, since it uses less digits than its factorization.

3977668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994421 (or 994419 counting only the distinct ones).

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

The square root of 3977668 is about 1994.4091856989. The cubic root of 3977668 is about 158.4441383815. Note that the first 3 decimals are identical.

The spelling of 3977668 in words is "three million, nine hundred seventy-seven thousand, six hundred sixty-eight".