3999421003 has 12 divisors (see below), whose sum is σ = 4251083032. Its totient is φ = 3761890560.

The previous prime is 3999420989. The next prime is 3999421031. The reversal of 3999421003 is 3001249993.

3999421003 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-3999421003 is a prime.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3999421103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 656176 + ... + 662242.

Almost surely, 2^3999421003 is an apocalyptic number.

3999421003 is a deficient number, since it is larger than the sum of its proper divisors (251662029).

3999421003 is a wasteful number, since it uses less digits than its factorization.

3999421003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8382 (or 8365 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 3999421003 is about 63240.9756645168. The cubic root of 3999421003 is about 1587.3244565685.

The spelling of 3999421003 in words is "three billion, nine hundred ninety-nine million, four hundred twenty-one thousand, three".