10039987 has 4 divisors (see below), whose sum is σ = 10311376. Its totient is φ = 9768600.

The previous prime is 10039973. The next prime is 10040011. The reversal of 10039987 is 78993001.

10039987 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, and also an emirpimes, since its reverse is a distinct semiprime: 78993001 = 1973 ⋅40037.

It is a cyclic number.

It is not a de Polignac number, because 10039987 - 2⁷ = 10039859 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 271351 = 10039987 / (1 + 0 + 0 + 3 + 9 + 9 + 8 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10039907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135639 + ... + 135712.

It is an arithmetic number, because the mean of its divisors is an integer number (2577844).

Almost surely, 2^10039987 is an apocalyptic number.

10039987 is a deficient number, since it is larger than the sum of its proper divisors (271389).

10039987 is an equidigital number, since it uses as much as digits as its factorization.

10039987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271388.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 10039987 is about 3168.5938521685. The cubic root of 10039987 is about 215.7302516894.

It can be divided in two parts, 10039 and 987, that added together give a triangular number (11026 = T₁₄₈).

The spelling of 10039987 in words is "ten million, thirty-nine thousand, nine hundred eighty-seven".