3977689 has 8 divisors (see below), whose sum is σ = 4180032. Its totient is φ = 3777840.

The previous prime is 3977681. The next prime is 3977693. The reversal of 3977689 is 9867793.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3977689 - 2³ = 3977681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3977681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3219 + ... + 4279.

It is an arithmetic number, because the mean of its divisors is an integer number (522504).

Almost surely, 2^3977689 is an apocalyptic number.

It is an amenable number.

3977689 is a deficient number, since it is larger than the sum of its proper divisors (202343).

3977689 is a wasteful number, since it uses less digits than its factorization.

3977689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247.

The product of its digits is 571536, while the sum is 49.

The square root of 3977689 is about 1994.4144504089. The cubic root of 3977689 is about 158.4444172150. Note that the first 4 decimals are identical.

The spelling of 3977689 in words is "three million, nine hundred seventy-seven thousand, six hundred eighty-nine".