648686803 has 2 divisors, whose sum is σ = 648686804. Its totient is φ = 648686802.

The previous prime is 648686767. The next prime is 648686807. The reversal of 648686803 is 308686846.

648686803 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-648686803 is a prime.

It is not a weakly prime, because it can be changed into another prime (648686807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324343401 + 324343402.

It is an arithmetic number, because the mean of its divisors is an integer number (324343402).

Almost surely, 2^648686803 is an apocalyptic number.

648686803 is a deficient number, since it is larger than the sum of its proper divisors (1).

648686803 is an equidigital number, since it uses as much as digits as its factorization.

648686803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1327104, while the sum is 49.

The square root of 648686803 is about 25469.3306350991. The cubic root of 648686803 is about 865.6553568713.

The spelling of 648686803 in words is "six hundred forty-eight million, six hundred eighty-six thousand, eight hundred three".