4006987 has 4 divisors (see below), whose sum is σ = 4013280. Its totient is φ = 4000696.

The previous prime is 4006979. The next prime is 4006993. The reversal of 4006987 is 7896004.

4006987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4006987 - 2³ = 4006979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4006927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2068 + ... + 3505.

It is an arithmetic number, because the mean of its divisors is an integer number (1003320).

Almost surely, 2^4006987 is an apocalyptic number.

4006987 is a deficient number, since it is larger than the sum of its proper divisors (6293).

4006987 is an equidigital number, since it uses as much as digits as its factorization.

4006987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6292.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 4006987 is about 2001.7459878816. The cubic root of 4006987 is about 158.8324778599.

The spelling of 4006987 in words is "four million, six thousand, nine hundred eighty-seven".