3977765 has 16 divisors (see below), whose sum is σ = 5377536. Its totient is φ = 2798400.

The previous prime is 3977761. The next prime is 3977777. The reversal of 3977765 is 5677793.

3977765 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3977765 - 2² = 3977761 is a prime.

It is a super-2 number, since 2×3977765² = 31645228790450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3977761) 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 in 15 ways as a sum of consecutive naturals, for example, 539 + ... + 2871.

It is an arithmetic number, because the mean of its divisors is an integer number (336096).

Almost surely, 2^3977765 is an apocalyptic number.

It is an amenable number.

3977765 is a deficient number, since it is larger than the sum of its proper divisors (1399771).

3977765 is a wasteful number, since it uses less digits than its factorization.

3977765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2380.

The product of its digits is 277830, while the sum is 44.

The square root of 3977765 is about 1994.4335035293. The cubic root of 3977765 is about 158.4454263185.

The spelling of 3977765 in words is "three million, nine hundred seventy-seven thousand, seven hundred sixty-five".