648738803 has 4 divisors (see below), whose sum is σ = 649527888. Its totient is φ = 647949720.

The previous prime is 648738773. The next prime is 648738863. The reversal of 648738803 is 308837846.

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 648738803 - 2¹⁰ = 648737779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648738863) 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, 393308 + ... + 394953.

It is an arithmetic number, because the mean of its divisors is an integer number (162381972).

Almost surely, 2^648738803 is an apocalyptic number.

648738803 is a deficient number, since it is larger than the sum of its proper divisors (789085).

648738803 is an equidigital number, since it uses as much as digits as its factorization.

648738803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789084.

The product of its (nonzero) digits is 774144, while the sum is 47.

The square root of 648738803 is about 25470.3514502647. The cubic root of 648738803 is about 865.6784871275.

The spelling of 648738803 in words is "six hundred forty-eight million, seven hundred thirty-eight thousand, eight hundred three".