2039987 has 4 divisors (see below), whose sum is σ = 2046120. Its totient is φ = 2033856.

The previous prime is 2039981. The next prime is 2039993. The reversal of 2039987 is 7899302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7899302 = 2 ⋅3949651.

It is an interprime number because it is at equal distance from previous prime (2039981) and next prime (2039993).

It is a cyclic number.

It is not a de Polignac number, because 2039987 - 2⁴ = 2039971 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2039987.

It is not an unprimeable number, because it can be changed into a prime (2039981) 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, 2537 + ... + 3242.

It is an arithmetic number, because the mean of its divisors is an integer number (511530).

2^2039987 is an apocalyptic number.

2039987 is a deficient number, since it is larger than the sum of its proper divisors (6133).

2039987 is an equidigital number, since it uses as much as digits as its factorization.

2039987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6132.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 2039987 is about 1428.2811347910. The cubic root of 2039987 is about 126.8262447044.

The spelling of 2039987 in words is "two million, thirty-nine thousand, nine hundred eighty-seven".