63990003 has 24 divisors (see below), whose sum is σ = 107183104. Its totient is φ = 33240240.

The previous prime is 63990001. The next prime is 63990007. The reversal of 63990003 is 30009936.

It is not a de Polignac number, because 63990003 - 2¹ = 63990001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63990001) 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, 10051 + ... + 15132.

Almost surely, 2^63990003 is an apocalyptic number.

63990003 is a deficient number, since it is larger than the sum of its proper divisors (43193101).

63990003 is a wasteful number, since it uses less digits than its factorization.

63990003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25215 (or 25204 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 30.

The square root of 63990003 is about 7999.3751630987. The cubic root of 63990003 is about 399.9791718322.

Adding to 63990003 its reverse (30009936), we get a palindrome (93999939).

The spelling of 63990003 in words is "sixty-three million, nine hundred ninety thousand, three".