3977687 has 4 divisors (see below), whose sum is σ = 4545936. Its totient is φ = 3409440.

The previous prime is 3977681. The next prime is 3977693. The reversal of 3977687 is 7867793.

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

It is an interprime number because it is at equal distance from previous prime (3977681) and next prime (3977693).

It is a cyclic number.

It is not a de Polignac number, because 3977687 - 2⁸ = 3977431 is a prime.

It is a Duffinian number.

It is a congruent number.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 284114 + ... + 284127.

It is an arithmetic number, because the mean of its divisors is an integer number (1136484).

Almost surely, 2^3977687 is an apocalyptic number.

3977687 is a deficient number, since it is larger than the sum of its proper divisors (568249).

3977687 is an equidigital number, since it uses as much as digits as its factorization.

3977687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568248.

The product of its digits is 444528, while the sum is 47.

The square root of 3977687 is about 1994.4139490086. The cubic root of 3977687 is about 158.4443906595. Note that the first 3 decimals are identical.

It can be divided in two parts, 3977 and 687, that added together give a palindrome (4664).

The spelling of 3977687 in words is "three million, nine hundred seventy-seven thousand, six hundred eighty-seven".