3974987 has 2 divisors, whose sum is σ = 3974988. Its totient is φ = 3974986.

The previous prime is 3974981. The next prime is 3975011. The reversal of 3974987 is 7894793.

It is a weak prime.

It is an emirp because it is prime and its reverse (7894793) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3974987 - 2¹⁸ = 3712843 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3974981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1987493 + 1987494.

It is an arithmetic number, because the mean of its divisors is an integer number (1987494).

Almost surely, 2^3974987 is an apocalyptic number.

3974987 is a deficient number, since it is larger than the sum of its proper divisors (1).

3974987 is an equidigital number, since it uses as much as digits as its factorization.

3974987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 381024, while the sum is 47.

The square root of 3974987 is about 1993.7369435309. The cubic root of 3974987 is about 158.4085325770.

The spelling of 3974987 in words is "three million, nine hundred seventy-four thousand, nine hundred eighty-seven".