3987943 has 2 divisors, whose sum is σ = 3987944. Its totient is φ = 3987942.

The previous prime is 3987937. The next prime is 3988003. The reversal of 3987943 is 3497893.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3987943 is a prime.

It is a d-powerful number, because it can be written as 3³ + 9⁶ + 8⁷ + 7⁷ + 9⁶ + 4⁶ + 3⁵ .

It is a self number, because there is not a number n which added to its sum of digits gives 3987943.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3987913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1993971 + 1993972.

It is an arithmetic number, because the mean of its divisors is an integer number (1993972).

Almost surely, 2^3987943 is an apocalyptic number.

3987943 is a deficient number, since it is larger than the sum of its proper divisors (1).

3987943 is an equidigital number, since it uses as much as digits as its factorization.

3987943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 43.

The square root of 3987943 is about 1996.9834751444. The cubic root of 3987943 is about 158.5804505555.

The spelling of 3987943 in words is "three million, nine hundred eighty-seven thousand, nine hundred forty-three".