10003987 has 6 divisors (see below), whose sum is σ = 11637348. Its totient is φ = 8574804.

The previous prime is 10003957. The next prime is 10003999. The reversal of 10003987 is 78930001.

It is not a de Polignac number, because 10003987 - 2⁷ = 10003859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10003957) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 102033 + ... + 102130.

It is an arithmetic number, because the mean of its divisors is an integer number (1939558).

Almost surely, 2^10003987 is an apocalyptic number.

10003987 is a deficient number, since it is larger than the sum of its proper divisors (1633361).

10003987 is an equidigital number, since it uses as much as digits as its factorization.

10003987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204177 (or 204170 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 10003987 is about 3162.9079973973. The cubic root of 10003987 is about 215.4720976358.

Adding to 10003987 its reverse (78930001), we get a palindrome (88933988).

It can be divided in two parts, 1000398 and 7, that added together give a triangular number (1000405 = T₁₄₁₄).

The spelling of 10003987 in words is "ten million, three thousand, nine hundred eighty-seven".