8421387003 has 24 divisors (see below), whose sum is σ = 13002706080. Its totient is φ = 5239175040.

The previous prime is 8421387001. The next prime is 8421387047. The reversal of 8421387003 is 3007831248.

It is not a de Polignac number, because 8421387003 - 2¹ = 8421387001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8421387001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 487648 + ... + 504621.

It is an arithmetic number, because the mean of its divisors is an integer number (541779420).

Almost surely, 2^8421387003 is an apocalyptic number.

8421387003 is a deficient number, since it is larger than the sum of its proper divisors (4581319077).

8421387003 is a wasteful number, since it uses less digits than its factorization.

8421387003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992339 (or 992336 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 8421387003 is about 91768.1153941825. The cubic root of 8421387003 is about 2034.5164635841.

The spelling of 8421387003 in words is "eight billion, four hundred twenty-one million, three hundred eighty-seven thousand, three".