3977181 has 24 divisors (see below), whose sum is σ = 6420960. Its totient is φ = 2445552.

The previous prime is 3977177. The next prime is 3977203. The reversal of 3977181 is 1817793.

It is not a de Polignac number, because 3977181 - 2² = 3977177 is a prime.

It is a super-4 number, since 4×3977181⁴ (a number of 28 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3977101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2530 + ... + 3788.

It is an arithmetic number, because the mean of its divisors is an integer number (267540).

Almost surely, 2^3977181 is an apocalyptic number.

It is an amenable number.

3977181 is a deficient number, since it is larger than the sum of its proper divisors (2443779).

3977181 is a wasteful number, since it uses less digits than its factorization.

3977181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1287 (or 1275 counting only the distinct ones).

The product of its digits is 10584, while the sum is 36.

The square root of 3977181 is about 1994.2870906667. The cubic root of 3977181 is about 158.4376718250.

The spelling of 3977181 in words is "three million, nine hundred seventy-seven thousand, one hundred eighty-one".