3987941 has 4 divisors (see below), whose sum is σ = 4010400. Its totient is φ = 3965484.

The previous prime is 3987937. The next prime is 3987943. The reversal of 3987941 is 1497893.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1497893 = 107 ⋅13999.

It is a cyclic number.

It is not a de Polignac number, because 3987941 - 2² = 3987937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3987943) 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, 10961 + ... + 11318.

It is an arithmetic number, because the mean of its divisors is an integer number (1002600).

Almost surely, 2^3987941 is an apocalyptic number.

It is an amenable number.

3987941 is a deficient number, since it is larger than the sum of its proper divisors (22459).

3987941 is a wasteful number, since it uses less digits than its factorization.

3987941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22458.

The product of its digits is 54432, while the sum is 41.

The square root of 3987941 is about 1996.9829743891. The cubic root of 3987941 is about 158.5804240455.

The spelling of 3987941 in words is "three million, nine hundred eighty-seven thousand, nine hundred forty-one".