4000987 has 2 divisors, whose sum is σ = 4000988. Its totient is φ = 4000986.

The previous prime is 4000979. The next prime is 4000993. The reversal of 4000987 is 7890004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4000987 - 2³ = 4000979 is a prime.

It is a Chen prime.

4000987 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (4000907) 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, 2000493 + 2000494.

It is an arithmetic number, because the mean of its divisors is an integer number (2000494).

Almost surely, 2^4000987 is an apocalyptic number.

4000987 is a deficient number, since it is larger than the sum of its proper divisors (1).

4000987 is an equidigital number, since it uses as much as digits as its factorization.

4000987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 4000987 is about 2000.2467347805. The cubic root of 4000987 is about 158.7531604967.

The spelling of 4000987 in words is "four million, nine hundred eighty-seven", and thus it is an aban number.