63840003 has 4 divisors (see below), whose sum is σ = 85120008. Its totient is φ = 42560000.

The previous prime is 63840001. The next prime is 63840013. The reversal of 63840003 is 30004836.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63840003 - 2¹ = 63840001 is a prime.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (63840001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10639998 + ... + 10640003.

It is an arithmetic number, because the mean of its divisors is an integer number (21280002).

Almost surely, 2^63840003 is an apocalyptic number.

63840003 is a deficient number, since it is larger than the sum of its proper divisors (21280005).

63840003 is a wasteful number, since it uses less digits than its factorization.

63840003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21280004.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 63840003 is about 7989.9939299101. The cubic root of 63840003 is about 399.6663947629. Note that the first 3 decimals are identical.

Adding to 63840003 its reverse (30004836), we get a palindrome (93844839).

The spelling of 63840003 in words is "sixty-three million, eight hundred forty thousand, three".