13003987 has 2 divisors, whose sum is σ = 13003988. Its totient is φ = 13003986.

The previous prime is 13003979. The next prime is 13004051. The reversal of 13003987 is 78930031.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13003987 - 2³ = 13003979 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13003937) 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, 6501993 + 6501994.

It is an arithmetic number, because the mean of its divisors is an integer number (6501994).

Almost surely, 2^13003987 is an apocalyptic number.

13003987 is a deficient number, since it is larger than the sum of its proper divisors (1).

13003987 is an equidigital number, since it uses as much as digits as its factorization.

13003987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 13003987 is about 3606.1041304987. The cubic root of 13003987 is about 235.1575041905.

The spelling of 13003987 in words is "thirteen million, three thousand, nine hundred eighty-seven".